Home / 128,422.20-192,374.10-89,023.80

Finding the Fourth Proportional to 128,422.20, 192,374.10 and 89,023.80

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Solution

The fourth proportional to 128,422.20, 192,374.10 and 89,023.80 is: 133,356.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,422.20 : 192,374.10 = 89,023.80 : x
  2. Step 2: Convert to fraction form
    128,422.20/192,374.10 = 89,023.80/x
  3. Step 3: Cross multiply
    128,422.20x = 192,374.10 × 89,023.80
  4. Step 4: Simplify right side
    128,422.20x = 17,125,873,403.58
  5. Step 5: Solve for x
    x = 17,125,873,403.58/128,422.20
  6. Step 6: Final answer
    x = 133,356.02

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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.