Home / 83,010.80-124,370.40-68,139.20

Finding the Fourth Proportional to 83,010.80, 124,370.40 and 68,139.20

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Solution

The fourth proportional to 83,010.80, 124,370.40 and 68,139.20 is: 102,089.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,010.80 : 124,370.40 = 68,139.20 : x
  2. Step 2: Convert to fraction form
    83,010.80/124,370.40 = 68,139.20/x
  3. Step 3: Cross multiply
    83,010.80x = 124,370.40 × 68,139.20
  4. Step 4: Simplify right side
    83,010.80x = 8,474,499,559.68
  5. Step 5: Solve for x
    x = 8,474,499,559.68/83,010.80
  6. Step 6: Final answer
    x = 102,089.12

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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.