Home / 87,854.40-131,791.20-85,089.60

Finding the Fourth Proportional to 87,854.40, 131,791.20 and 85,089.60

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Solution

The fourth proportional to 87,854.40, 131,791.20 and 85,089.60 is: 127,643.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,854.40 : 131,791.20 = 85,089.60 : x
  2. Step 2: Convert to fraction form
    87,854.40/131,791.20 = 85,089.60/x
  3. Step 3: Cross multiply
    87,854.40x = 131,791.20 × 85,089.60
  4. Step 4: Simplify right side
    87,854.40x = 11,214,060,491.52
  5. Step 5: Solve for x
    x = 11,214,060,491.52/87,854.40
  6. Step 6: Final answer
    x = 127,643.70

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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.