Home / 136,221.83-187,983.18-78,863.57

Finding the Fourth Proportional to 136,221.83, 187,983.18 and 78,863.57

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Solution

The fourth proportional to 136,221.83, 187,983.18 and 78,863.57 is: 108,830.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.83 : 187,983.18 = 78,863.57 : x
  2. Step 2: Convert to fraction form
    136,221.83/187,983.18 = 78,863.57/x
  3. Step 3: Cross multiply
    136,221.83x = 187,983.18 × 78,863.57
  4. Step 4: Simplify right side
    136,221.83x = 14,825,024,280.43
  5. Step 5: Solve for x
    x = 14,825,024,280.43/136,221.83
  6. Step 6: Final answer
    x = 108,830.02

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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.