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Finding the Fourth Proportional to 72,539.49, 108,743.58 and 25,781.43

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Solution

The fourth proportional to 72,539.49, 108,743.58 and 25,781.43 is: 38,648.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,539.49 : 108,743.58 = 25,781.43 : x
  2. Step 2: Convert to fraction form
    72,539.49/108,743.58 = 25,781.43/x
  3. Step 3: Cross multiply
    72,539.49x = 108,743.58 × 25,781.43
  4. Step 4: Simplify right side
    72,539.49x = 2,803,564,995.72
  5. Step 5: Solve for x
    x = 2,803,564,995.72/72,539.49
  6. Step 6: Final answer
    x = 38,648.81

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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.