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Finding the Fourth Proportional to 108,640.38, 162,981.90 and 52,519.26

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Solution

The fourth proportional to 108,640.38, 162,981.90 and 52,519.26 is: 78,789.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,640.38 : 162,981.90 = 52,519.26 : x
  2. Step 2: Convert to fraction form
    108,640.38/162,981.90 = 52,519.26/x
  3. Step 3: Cross multiply
    108,640.38x = 162,981.90 × 52,519.26
  4. Step 4: Simplify right side
    108,640.38x = 8,559,688,781.39
  5. Step 5: Solve for x
    x = 8,559,688,781.39/108,640.38
  6. Step 6: Final answer
    x = 78,789.20

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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.