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Finding the Fourth Proportional to 87,491.80, 131,237.70 and 83,652.40

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Solution

The fourth proportional to 87,491.80, 131,237.70 and 83,652.40 is: 125,478.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,491.80 : 131,237.70 = 83,652.40 : x
  2. Step 2: Convert to fraction form
    87,491.80/131,237.70 = 83,652.40/x
  3. Step 3: Cross multiply
    87,491.80x = 131,237.70 × 83,652.40
  4. Step 4: Simplify right side
    87,491.80x = 10,978,348,575.48
  5. Step 5: Solve for x
    x = 10,978,348,575.48/87,491.80
  6. Step 6: Final answer
    x = 125,478.60

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1.5x scale

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.