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Finding the Fourth Proportional to 99,239.57, 136,951.05 and 53,918.38

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Solution

The fourth proportional to 99,239.57, 136,951.05 and 53,918.38 is: 74,407.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,239.57 : 136,951.05 = 53,918.38 : x
  2. Step 2: Convert to fraction form
    99,239.57/136,951.05 = 53,918.38/x
  3. Step 3: Cross multiply
    99,239.57x = 136,951.05 × 53,918.38
  4. Step 4: Simplify right side
    99,239.57x = 7,384,178,755.30
  5. Step 5: Solve for x
    x = 7,384,178,755.30/99,239.57
  6. Step 6: Final answer
    x = 74,407.61

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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.