Home / 221,144.30-331,520.05-86,177.10

Finding the Fourth Proportional to 221,144.30, 331,520.05 and 86,177.10

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Solution

The fourth proportional to 221,144.30, 331,520.05 and 86,177.10 is: 129,189.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,144.30 : 331,520.05 = 86,177.10 : x
  2. Step 2: Convert to fraction form
    221,144.30/331,520.05 = 86,177.10/x
  3. Step 3: Cross multiply
    221,144.30x = 331,520.05 × 86,177.10
  4. Step 4: Simplify right side
    221,144.30x = 28,569,436,500.86
  5. Step 5: Solve for x
    x = 28,569,436,500.86/221,144.30
  6. Step 6: Final answer
    x = 129,189.12

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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.