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Finding the Fourth Proportional to 66,489.76, 99,715.12 and 54,773.92

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Solution

The fourth proportional to 66,489.76, 99,715.12 and 54,773.92 is: 82,144.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,489.76 : 99,715.12 = 54,773.92 : x
  2. Step 2: Convert to fraction form
    66,489.76/99,715.12 = 54,773.92/x
  3. Step 3: Cross multiply
    66,489.76x = 99,715.12 × 54,773.92
  4. Step 4: Simplify right side
    66,489.76x = 5,461,788,005.67
  5. Step 5: Solve for x
    x = 5,461,788,005.67/66,489.76
  6. Step 6: Final answer
    x = 82,144.80

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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.