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Finding the Fourth Proportional to 72,146.35, 108,244.12 and 38,869.83

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Solution

The fourth proportional to 72,146.35, 108,244.12 and 38,869.83 is: 58,317.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,146.35 : 108,244.12 = 38,869.83 : x
  2. Step 2: Convert to fraction form
    72,146.35/108,244.12 = 38,869.83/x
  3. Step 3: Cross multiply
    72,146.35x = 108,244.12 × 38,869.83
  4. Step 4: Simplify right side
    72,146.35x = 4,207,430,001.68
  5. Step 5: Solve for x
    x = 4,207,430,001.68/72,146.35
  6. Step 6: Final answer
    x = 58,317.99

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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.