Home / 115,789.80-173,505.39-80,320.11

Finding the Fourth Proportional to 115,789.80, 173,505.39 and 80,320.11

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Solution

The fourth proportional to 115,789.80, 173,505.39 and 80,320.11 is: 120,355.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,789.80 : 173,505.39 = 80,320.11 : x
  2. Step 2: Convert to fraction form
    115,789.80/173,505.39 = 80,320.11/x
  3. Step 3: Cross multiply
    115,789.80x = 173,505.39 × 80,320.11
  4. Step 4: Simplify right side
    115,789.80x = 13,935,971,510.35
  5. Step 5: Solve for x
    x = 13,935,971,510.35/115,789.80
  6. Step 6: Final answer
    x = 120,355.77

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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.