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Finding the Fourth Proportional to 74,387.72, 102,725.11 and 51,788.50

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Solution

The fourth proportional to 74,387.72, 102,725.11 and 51,788.50 is: 71,516.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,387.72 : 102,725.11 = 51,788.50 : x
  2. Step 2: Convert to fraction form
    74,387.72/102,725.11 = 51,788.50/x
  3. Step 3: Cross multiply
    74,387.72x = 102,725.11 × 51,788.50
  4. Step 4: Simplify right side
    74,387.72x = 5,319,979,552.38
  5. Step 5: Solve for x
    x = 5,319,979,552.38/74,387.72
  6. Step 6: Final answer
    x = 71,516.91

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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.