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Finding the Fourth Proportional to 87,246.40, 130,869.60 and 39,861.40

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Solution

The fourth proportional to 87,246.40, 130,869.60 and 39,861.40 is: 59,792.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,246.40 : 130,869.60 = 39,861.40 : x
  2. Step 2: Convert to fraction form
    87,246.40/130,869.60 = 39,861.40/x
  3. Step 3: Cross multiply
    87,246.40x = 130,869.60 × 39,861.40
  4. Step 4: Simplify right side
    87,246.40x = 5,216,645,473.44
  5. Step 5: Solve for x
    x = 5,216,645,473.44/87,246.40
  6. Step 6: Final answer
    x = 59,792.10

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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.