Home / 115,778.40-173,387.31-80,139.87

Finding the Fourth Proportional to 115,778.40, 173,387.31 and 80,139.87

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Solution

The fourth proportional to 115,778.40, 173,387.31 and 80,139.87 is: 120,015.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,778.40 : 173,387.31 = 80,139.87 : x
  2. Step 2: Convert to fraction form
    115,778.40/173,387.31 = 80,139.87/x
  3. Step 3: Cross multiply
    115,778.40x = 173,387.31 × 80,139.87
  4. Step 4: Simplify right side
    115,778.40x = 13,895,236,633.31
  5. Step 5: Solve for x
    x = 13,895,236,633.31/115,778.40
  6. Step 6: Final answer
    x = 120,015.79

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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.