Home / 87,686.40-131,443.20-43,276.80

Finding the Fourth Proportional to 87,686.40, 131,443.20 and 43,276.80

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Solution

The fourth proportional to 87,686.40, 131,443.20 and 43,276.80 is: 64,872.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,686.40 : 131,443.20 = 43,276.80 : x
  2. Step 2: Convert to fraction form
    87,686.40/131,443.20 = 43,276.80/x
  3. Step 3: Cross multiply
    87,686.40x = 131,443.20 × 43,276.80
  4. Step 4: Simplify right side
    87,686.40x = 5,688,441,077.76
  5. Step 5: Solve for x
    x = 5,688,441,077.76/87,686.40
  6. Step 6: Final answer
    x = 64,872.56

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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.