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Finding the Fourth Proportional to 71,516.60, 98,693.07 and 39,685.58

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Solution

The fourth proportional to 71,516.60, 98,693.07 and 39,685.58 is: 54,766.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,516.60 : 98,693.07 = 39,685.58 : x
  2. Step 2: Convert to fraction form
    71,516.60/98,693.07 = 39,685.58/x
  3. Step 3: Cross multiply
    71,516.60x = 98,693.07 × 39,685.58
  4. Step 4: Simplify right side
    71,516.60x = 3,916,691,724.93
  5. Step 5: Solve for x
    x = 3,916,691,724.93/71,516.60
  6. Step 6: Final answer
    x = 54,766.19

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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.