Home / 128,024.20-192,036.30-81,310.60

Finding the Fourth Proportional to 128,024.20, 192,036.30 and 81,310.60

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Solution

The fourth proportional to 128,024.20, 192,036.30 and 81,310.60 is: 121,965.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,024.20 : 192,036.30 = 81,310.60 : x
  2. Step 2: Convert to fraction form
    128,024.20/192,036.30 = 81,310.60/x
  3. Step 3: Cross multiply
    128,024.20x = 192,036.30 × 81,310.60
  4. Step 4: Simplify right side
    128,024.20x = 15,614,586,774.78
  5. Step 5: Solve for x
    x = 15,614,586,774.78/128,024.20
  6. Step 6: Final answer
    x = 121,965.90

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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.