Home / 78,939.18-118,407.11-25,631.10

Finding the Fourth Proportional to 78,939.18, 118,407.11 and 25,631.10

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Solution

The fourth proportional to 78,939.18, 118,407.11 and 25,631.10 is: 38,446.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.18 : 118,407.11 = 25,631.10 : x
  2. Step 2: Convert to fraction form
    78,939.18/118,407.11 = 25,631.10/x
  3. Step 3: Cross multiply
    78,939.18x = 118,407.11 × 25,631.10
  4. Step 4: Simplify right side
    78,939.18x = 3,034,904,348.97
  5. Step 5: Solve for x
    x = 3,034,904,348.97/78,939.18
  6. Step 6: Final answer
    x = 38,446.11

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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.