Home / 115,743.68-159,793.20-77,011.92

Finding the Fourth Proportional to 115,743.68, 159,793.20 and 77,011.92

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Solution

The fourth proportional to 115,743.68, 159,793.20 and 77,011.92 is: 106,320.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,743.68 : 159,793.20 = 77,011.92 : x
  2. Step 2: Convert to fraction form
    115,743.68/159,793.20 = 77,011.92/x
  3. Step 3: Cross multiply
    115,743.68x = 159,793.20 × 77,011.92
  4. Step 4: Simplify right side
    115,743.68x = 12,305,981,134.94
  5. Step 5: Solve for x
    x = 12,305,981,134.94/115,743.68
  6. Step 6: Final answer
    x = 106,320.98

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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.