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Finding the Fourth Proportional to 72,183,728.80, 108,275,593.20 and 55,177,616.80

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Solution

The fourth proportional to 72,183,728.80, 108,275,593.20 and 55,177,616.80 is: 82,766,425.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,183,728.80 : 108,275,593.20 = 55,177,616.80 : x
  2. Step 2: Convert to fraction form
    72,183,728.80/108,275,593.20 = 55,177,616.80/x
  3. Step 3: Cross multiply
    72,183,728.80x = 108,275,593.20 × 55,177,616.80
  4. Step 4: Simplify right side
    72,183,728.80x = 5,974,389,190,382,286
  5. Step 5: Solve for x
    x = 5,974,389,190,382,286/72,183,728.80
  6. Step 6: Final answer
    x = 82,766,425.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.