Home / 128,001.10-192,001.65-115,753.90

Finding the Fourth Proportional to 128,001.10, 192,001.65 and 115,753.90

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Solution

The fourth proportional to 128,001.10, 192,001.65 and 115,753.90 is: 173,630.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.10 : 192,001.65 = 115,753.90 : x
  2. Step 2: Convert to fraction form
    128,001.10/192,001.65 = 115,753.90/x
  3. Step 3: Cross multiply
    128,001.10x = 192,001.65 × 115,753.90
  4. Step 4: Simplify right side
    128,001.10x = 22,224,939,793.94
  5. Step 5: Solve for x
    x = 22,224,939,793.94/128,001.10
  6. Step 6: Final answer
    x = 173,630.85

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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.