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Finding the Fourth Proportional to 66,429.43, 99,701.72 and 34,861.80

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Solution

The fourth proportional to 66,429.43, 99,701.72 and 34,861.80 is: 52,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429.43 : 99,701.72 = 34,861.80 : x
  2. Step 2: Convert to fraction form
    66,429.43/99,701.72 = 34,861.80/x
  3. Step 3: Cross multiply
    66,429.43x = 99,701.72 × 34,861.80
  4. Step 4: Simplify right side
    66,429.43x = 3,475,780,998.73
  5. Step 5: Solve for x
    x = 3,475,780,998.73/66,429.43
  6. Step 6: Final answer
    x = 52,322.91

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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.