Home / 87,639.90-131,469.45-84,875.10

Finding the Fourth Proportional to 87,639.90, 131,469.45 and 84,875.10

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Solution

The fourth proportional to 87,639.90, 131,469.45 and 84,875.10 is: 127,321.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,639.90 : 131,469.45 = 84,875.10 : x
  2. Step 2: Convert to fraction form
    87,639.90/131,469.45 = 84,875.10/x
  3. Step 3: Cross multiply
    87,639.90x = 131,469.45 × 84,875.10
  4. Step 4: Simplify right side
    87,639.90x = 11,158,482,715.70
  5. Step 5: Solve for x
    x = 11,158,482,715.70/87,639.90
  6. Step 6: Final answer
    x = 127,321.95

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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.