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Finding the Fourth Proportional to 66,747.16, 100,123.98 and 55,038.88

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Solution

The fourth proportional to 66,747.16, 100,123.98 and 55,038.88 is: 82,560.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,747.16 : 100,123.98 = 55,038.88 : x
  2. Step 2: Convert to fraction form
    66,747.16/100,123.98 = 55,038.88/x
  3. Step 3: Cross multiply
    66,747.16x = 100,123.98 × 55,038.88
  4. Step 4: Simplify right side
    66,747.16x = 5,510,711,720.34
  5. Step 5: Solve for x
    x = 5,510,711,720.34/66,747.16
  6. Step 6: Final answer
    x = 82,560.99

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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.