Home / 81,118.52-121,708.94-57,125.85

Finding the Fourth Proportional to 81,118.52, 121,708.94 and 57,125.85

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Solution

The fourth proportional to 81,118.52, 121,708.94 and 57,125.85 is: 85,710.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,118.52 : 121,708.94 = 57,125.85 : x
  2. Step 2: Convert to fraction form
    81,118.52/121,708.94 = 57,125.85/x
  3. Step 3: Cross multiply
    81,118.52x = 121,708.94 × 57,125.85
  4. Step 4: Simplify right side
    81,118.52x = 6,952,726,716.22
  5. Step 5: Solve for x
    x = 6,952,726,716.22/81,118.52
  6. Step 6: Final answer
    x = 85,710.72

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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.