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Finding the Fourth Proportional to 66,638.55, 99,793.80 and 44,331.15

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Solution

The fourth proportional to 66,638.55, 99,793.80 and 44,331.15 is: 66,387.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.55 : 99,793.80 = 44,331.15 : x
  2. Step 2: Convert to fraction form
    66,638.55/99,793.80 = 44,331.15/x
  3. Step 3: Cross multiply
    66,638.55x = 99,793.80 × 44,331.15
  4. Step 4: Simplify right side
    66,638.55x = 4,423,973,916.87
  5. Step 5: Solve for x
    x = 4,423,973,916.87/66,638.55
  6. Step 6: Final answer
    x = 66,387.61

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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.