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Finding the Fourth Proportional to 72,344.43, 108,542.75 and 38,574.93

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Solution

The fourth proportional to 72,344.43, 108,542.75 and 38,574.93 is: 57,876.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,344.43 : 108,542.75 = 38,574.93 : x
  2. Step 2: Convert to fraction form
    72,344.43/108,542.75 = 38,574.93/x
  3. Step 3: Cross multiply
    72,344.43x = 108,542.75 × 38,574.93
  4. Step 4: Simplify right side
    72,344.43x = 4,187,028,790.38
  5. Step 5: Solve for x
    x = 4,187,028,790.38/72,344.43
  6. Step 6: Final answer
    x = 57,876.31

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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.