Home / 136,221.95-187,983.35-78,863.69

Finding the Fourth Proportional to 136,221.95, 187,983.35 and 78,863.69

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Solution

The fourth proportional to 136,221.95, 187,983.35 and 78,863.69 is: 108,830.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.95 : 187,983.35 = 78,863.69 : x
  2. Step 2: Convert to fraction form
    136,221.95/187,983.35 = 78,863.69/x
  3. Step 3: Cross multiply
    136,221.95x = 187,983.35 × 78,863.69
  4. Step 4: Simplify right side
    136,221.95x = 14,825,061,010.94
  5. Step 5: Solve for x
    x = 14,825,061,010.94/136,221.95
  6. Step 6: Final answer
    x = 108,830.19

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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.