Home / 124,789.62-172,286-81,223.77

Finding the Fourth Proportional to 124,789.62, 172,286 and 81,223.77

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Solution

The fourth proportional to 124,789.62, 172,286 and 81,223.77 is: 112,138.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,789.62 : 172,286 = 81,223.77 : x
  2. Step 2: Convert to fraction form
    124,789.62/172,286 = 81,223.77/x
  3. Step 3: Cross multiply
    124,789.62x = 172,286 × 81,223.77
  4. Step 4: Simplify right side
    124,789.62x = 13,993,718,438.22
  5. Step 5: Solve for x
    x = 13,993,718,438.22/124,789.62
  6. Step 6: Final answer
    x = 112,138.48

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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.