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Finding the Fourth Proportional to 98,432.90, 135,790.17 and 64,426.42

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Solution

The fourth proportional to 98,432.90, 135,790.17 and 64,426.42 is: 88,877.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,432.90 : 135,790.17 = 64,426.42 : x
  2. Step 2: Convert to fraction form
    98,432.90/135,790.17 = 64,426.42/x
  3. Step 3: Cross multiply
    98,432.90x = 135,790.17 × 64,426.42
  4. Step 4: Simplify right side
    98,432.90x = 8,748,474,524.29
  5. Step 5: Solve for x
    x = 8,748,474,524.29/98,432.90
  6. Step 6: Final answer
    x = 88,877.55

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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.