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Finding the Fourth Proportional to 72,431.80, 108,501.90 and 50,270.20

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Solution

The fourth proportional to 72,431.80, 108,501.90 and 50,270.20 is: 75,304.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,431.80 : 108,501.90 = 50,270.20 : x
  2. Step 2: Convert to fraction form
    72,431.80/108,501.90 = 50,270.20/x
  3. Step 3: Cross multiply
    72,431.80x = 108,501.90 × 50,270.20
  4. Step 4: Simplify right side
    72,431.80x = 5,454,412,213.38
  5. Step 5: Solve for x
    x = 5,454,412,213.38/72,431.80
  6. Step 6: Final answer
    x = 75,304.11

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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.