Home / 87,421.80-131,132.70-80,663.40

Finding the Fourth Proportional to 87,421.80, 131,132.70 and 80,663.40

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Solution

The fourth proportional to 87,421.80, 131,132.70 and 80,663.40 is: 120,995.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,421.80 : 131,132.70 = 80,663.40 : x
  2. Step 2: Convert to fraction form
    87,421.80/131,132.70 = 80,663.40/x
  3. Step 3: Cross multiply
    87,421.80x = 131,132.70 × 80,663.40
  4. Step 4: Simplify right side
    87,421.80x = 10,577,609,433.18
  5. Step 5: Solve for x
    x = 10,577,609,433.18/87,421.80
  6. Step 6: Final answer
    x = 120,995.10

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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.