Home / 87,818.20-131,420.10-80,445.40

Finding the Fourth Proportional to 87,818.20, 131,420.10 and 80,445.40

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Solution

The fourth proportional to 87,818.20, 131,420.10 and 80,445.40 is: 120,386.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,818.20 : 131,420.10 = 80,445.40 : x
  2. Step 2: Convert to fraction form
    87,818.20/131,420.10 = 80,445.40/x
  3. Step 3: Cross multiply
    87,818.20x = 131,420.10 × 80,445.40
  4. Step 4: Simplify right side
    87,818.20x = 10,572,142,512.54
  5. Step 5: Solve for x
    x = 10,572,142,512.54/87,818.20
  6. Step 6: Final answer
    x = 120,386.69

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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.