Home / 99,806.41-137,760.65-57,378.61

Finding the Fourth Proportional to 99,806.41, 137,760.65 and 57,378.61

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Solution

The fourth proportional to 99,806.41, 137,760.65 and 57,378.61 is: 79,198.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,806.41 : 137,760.65 = 57,378.61 : x
  2. Step 2: Convert to fraction form
    99,806.41/137,760.65 = 57,378.61/x
  3. Step 3: Cross multiply
    99,806.41x = 137,760.65 × 57,378.61
  4. Step 4: Simplify right side
    99,806.41x = 7,904,514,609.70
  5. Step 5: Solve for x
    x = 7,904,514,609.70/99,806.41
  6. Step 6: Final answer
    x = 79,198.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.