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Finding the Fourth Proportional to 79,728.54, 110,021.85 and 45,712.68

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Solution

The fourth proportional to 79,728.54, 110,021.85 and 45,712.68 is: 63,081.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,728.54 : 110,021.85 = 45,712.68 : x
  2. Step 2: Convert to fraction form
    79,728.54/110,021.85 = 45,712.68/x
  3. Step 3: Cross multiply
    79,728.54x = 110,021.85 × 45,712.68
  4. Step 4: Simplify right side
    79,728.54x = 5,029,393,622.06
  5. Step 5: Solve for x
    x = 5,029,393,622.06/79,728.54
  6. Step 6: Final answer
    x = 63,081.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.