Home / 87,689.40-131,534.10-80,431.80

Finding the Fourth Proportional to 87,689.40, 131,534.10 and 80,431.80

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Solution

The fourth proportional to 87,689.40, 131,534.10 and 80,431.80 is: 120,647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.40 : 131,534.10 = 80,431.80 : x
  2. Step 2: Convert to fraction form
    87,689.40/131,534.10 = 80,431.80/x
  3. Step 3: Cross multiply
    87,689.40x = 131,534.10 × 80,431.80
  4. Step 4: Simplify right side
    87,689.40x = 10,579,524,424.38
  5. Step 5: Solve for x
    x = 10,579,524,424.38/87,689.40
  6. Step 6: Final answer
    x = 120,647.70

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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.