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Finding the Fourth Proportional to 71,788.59, 99,064.41 and 39,516.93

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Solution

The fourth proportional to 71,788.59, 99,064.41 and 39,516.93 is: 54,531.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,788.59 : 99,064.41 = 39,516.93 : x
  2. Step 2: Convert to fraction form
    71,788.59/99,064.41 = 39,516.93/x
  3. Step 3: Cross multiply
    71,788.59x = 99,064.41 × 39,516.93
  4. Step 4: Simplify right side
    71,788.59x = 3,914,721,355.46
  5. Step 5: Solve for x
    x = 3,914,721,355.46/71,788.59
  6. Step 6: Final answer
    x = 54,531.25

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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.