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Finding the Fourth Proportional to 91,440.80, 137,115.84 and 29,103.20

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Solution

The fourth proportional to 91,440.80, 137,115.84 and 29,103.20 is: 43,640.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,440.80 : 137,115.84 = 29,103.20 : x
  2. Step 2: Convert to fraction form
    91,440.80/137,115.84 = 29,103.20/x
  3. Step 3: Cross multiply
    91,440.80x = 137,115.84 × 29,103.20
  4. Step 4: Simplify right side
    91,440.80x = 3,990,509,714.69
  5. Step 5: Solve for x
    x = 3,990,509,714.69/91,440.80
  6. Step 6: Final answer
    x = 43,640.36

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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.