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Finding the Fourth Proportional to 66,871.59, 100,098.20 and 43,147.40

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Solution

The fourth proportional to 66,871.59, 100,098.20 and 43,147.40 is: 64,586.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,871.59 : 100,098.20 = 43,147.40 : x
  2. Step 2: Convert to fraction form
    66,871.59/100,098.20 = 43,147.40/x
  3. Step 3: Cross multiply
    66,871.59x = 100,098.20 × 43,147.40
  4. Step 4: Simplify right side
    66,871.59x = 4,318,976,358.45
  5. Step 5: Solve for x
    x = 4,318,976,358.45/66,871.59
  6. Step 6: Final answer
    x = 64,586.12

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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.