Home / 87,416.20-131,124.30-85,666.60

Finding the Fourth Proportional to 87,416.20, 131,124.30 and 85,666.60

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Solution

The fourth proportional to 87,416.20, 131,124.30 and 85,666.60 is: 128,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,416.20 : 131,124.30 = 85,666.60 : x
  2. Step 2: Convert to fraction form
    87,416.20/131,124.30 = 85,666.60/x
  3. Step 3: Cross multiply
    87,416.20x = 131,124.30 × 85,666.60
  4. Step 4: Simplify right side
    87,416.20x = 11,232,972,958.38
  5. Step 5: Solve for x
    x = 11,232,972,958.38/87,416.20
  6. Step 6: Final answer
    x = 128,499.90

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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.