Home / 83,712.15-125,407.85-80,898.21

Finding the Fourth Proportional to 83,712.15, 125,407.85 and 80,898.21

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Solution

The fourth proportional to 83,712.15, 125,407.85 and 80,898.21 is: 121,192.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,712.15 : 125,407.85 = 80,898.21 : x
  2. Step 2: Convert to fraction form
    83,712.15/125,407.85 = 80,898.21/x
  3. Step 3: Cross multiply
    83,712.15x = 125,407.85 × 80,898.21
  4. Step 4: Simplify right side
    83,712.15x = 10,145,270,180.46
  5. Step 5: Solve for x
    x = 10,145,270,180.46/83,712.15
  6. Step 6: Final answer
    x = 121,192.33

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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.