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Finding the Fourth Proportional to 98,855.31, 136,414.92 and 58,572.78

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Solution

The fourth proportional to 98,855.31, 136,414.92 and 58,572.78 is: 80,827.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,855.31 : 136,414.92 = 58,572.78 : x
  2. Step 2: Convert to fraction form
    98,855.31/136,414.92 = 58,572.78/x
  3. Step 3: Cross multiply
    98,855.31x = 136,414.92 × 58,572.78
  4. Step 4: Simplify right side
    98,855.31x = 7,990,201,097.88
  5. Step 5: Solve for x
    x = 7,990,201,097.88/98,855.31
  6. Step 6: Final answer
    x = 80,827.23

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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.