Home / 136,221.96-187,983.38-78,863.71

Finding the Fourth Proportional to 136,221.96, 187,983.38 and 78,863.71

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Solution

The fourth proportional to 136,221.96, 187,983.38 and 78,863.71 is: 108,830.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.96 : 187,983.38 = 78,863.71 : x
  2. Step 2: Convert to fraction form
    136,221.96/187,983.38 = 78,863.71/x
  3. Step 3: Cross multiply
    136,221.96x = 187,983.38 × 78,863.71
  4. Step 4: Simplify right side
    136,221.96x = 14,825,066,765.14
  5. Step 5: Solve for x
    x = 14,825,066,765.14/136,221.96
  6. Step 6: Final answer
    x = 108,830.23

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1.5x scale

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.