Home / 87,713.40-131,570.10-80,455.80

Finding the Fourth Proportional to 87,713.40, 131,570.10 and 80,455.80

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Solution

The fourth proportional to 87,713.40, 131,570.10 and 80,455.80 is: 120,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,713.40 : 131,570.10 = 80,455.80 : x
  2. Step 2: Convert to fraction form
    87,713.40/131,570.10 = 80,455.80/x
  3. Step 3: Cross multiply
    87,713.40x = 131,570.10 × 80,455.80
  4. Step 4: Simplify right side
    87,713.40x = 10,585,577,651.58
  5. Step 5: Solve for x
    x = 10,585,577,651.58/87,713.40
  6. Step 6: Final answer
    x = 120,683.70

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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.