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Finding the Fourth Proportional to 103,664.57, 155,489.47 and 40,472.86

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Solution

The fourth proportional to 103,664.57, 155,489.47 and 40,472.86 is: 60,706.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,664.57 : 155,489.47 = 40,472.86 : x
  2. Step 2: Convert to fraction form
    103,664.57/155,489.47 = 40,472.86/x
  3. Step 3: Cross multiply
    103,664.57x = 155,489.47 × 40,472.86
  4. Step 4: Simplify right side
    103,664.57x = 6,293,103,550.78
  5. Step 5: Solve for x
    x = 6,293,103,550.78/103,664.57
  6. Step 6: Final answer
    x = 60,706.41

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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.