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Finding the Fourth Proportional to 99,127.92, 136,910.07 and 65,287.65

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Solution

The fourth proportional to 99,127.92, 136,910.07 and 65,287.65 is: 90,171.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,127.92 : 136,910.07 = 65,287.65 : x
  2. Step 2: Convert to fraction form
    99,127.92/136,910.07 = 65,287.65/x
  3. Step 3: Cross multiply
    99,127.92x = 136,910.07 × 65,287.65
  4. Step 4: Simplify right side
    99,127.92x = 8,938,536,731.64
  5. Step 5: Solve for x
    x = 8,938,536,731.64/99,127.92
  6. Step 6: Final answer
    x = 90,171.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.