Home / 128,262.60-192,436.56-80,822.88

Finding the Fourth Proportional to 128,262.60, 192,436.56 and 80,822.88

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Solution

The fourth proportional to 128,262.60, 192,436.56 and 80,822.88 is: 121,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,262.60 : 192,436.56 = 80,822.88 : x
  2. Step 2: Convert to fraction form
    128,262.60/192,436.56 = 80,822.88/x
  3. Step 3: Cross multiply
    128,262.60x = 192,436.56 × 80,822.88
  4. Step 4: Simplify right side
    128,262.60x = 15,553,276,996.49
  5. Step 5: Solve for x
    x = 15,553,276,996.49/128,262.60
  6. Step 6: Final answer
    x = 121,261.20

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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.