Home / 87,631.60-131,447.40-72,857.20

Finding the Fourth Proportional to 87,631.60, 131,447.40 and 72,857.20

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Solution

The fourth proportional to 87,631.60, 131,447.40 and 72,857.20 is: 109,285.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,631.60 : 131,447.40 = 72,857.20 : x
  2. Step 2: Convert to fraction form
    87,631.60/131,447.40 = 72,857.20/x
  3. Step 3: Cross multiply
    87,631.60x = 131,447.40 × 72,857.20
  4. Step 4: Simplify right side
    87,631.60x = 9,576,889,511.28
  5. Step 5: Solve for x
    x = 9,576,889,511.28/87,631.60
  6. Step 6: Final answer
    x = 109,285.80

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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.