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Finding the Fourth Proportional to 83,040.80, 124,561.20 and 68,460.80

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Solution

The fourth proportional to 83,040.80, 124,561.20 and 68,460.80 is: 102,691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,040.80 : 124,561.20 = 68,460.80 : x
  2. Step 2: Convert to fraction form
    83,040.80/124,561.20 = 68,460.80/x
  3. Step 3: Cross multiply
    83,040.80x = 124,561.20 × 68,460.80
  4. Step 4: Simplify right side
    83,040.80x = 8,527,559,400.96
  5. Step 5: Solve for x
    x = 8,527,559,400.96/83,040.80
  6. Step 6: Final answer
    x = 102,691.20

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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.