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Finding the Fourth Proportional to 66,468.70, 99,856.65 and 45,732.70

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Solution

The fourth proportional to 66,468.70, 99,856.65 and 45,732.70 is: 68,704.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,468.70 : 99,856.65 = 45,732.70 : x
  2. Step 2: Convert to fraction form
    66,468.70/99,856.65 = 45,732.70/x
  3. Step 3: Cross multiply
    66,468.70x = 99,856.65 × 45,732.70
  4. Step 4: Simplify right side
    66,468.70x = 4,566,714,217.46
  5. Step 5: Solve for x
    x = 4,566,714,217.46/66,468.70
  6. Step 6: Final answer
    x = 68,704.73

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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.