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Finding the Fourth Proportional to 83,691.54, 125,430.57 and 39,220.20

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Solution

The fourth proportional to 83,691.54, 125,430.57 and 39,220.20 is: 58,780.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,691.54 : 125,430.57 = 39,220.20 : x
  2. Step 2: Convert to fraction form
    83,691.54/125,430.57 = 39,220.20/x
  3. Step 3: Cross multiply
    83,691.54x = 125,430.57 × 39,220.20
  4. Step 4: Simplify right side
    83,691.54x = 4,919,412,041.51
  5. Step 5: Solve for x
    x = 4,919,412,041.51/83,691.54
  6. Step 6: Final answer
    x = 58,780.28

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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.