Home / 135,729.96-187,242.39-81,244.95

Finding the Fourth Proportional to 135,729.96, 187,242.39 and 81,244.95

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Solution

The fourth proportional to 135,729.96, 187,242.39 and 81,244.95 is: 112,079.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,729.96 : 187,242.39 = 81,244.95 : x
  2. Step 2: Convert to fraction form
    135,729.96/187,242.39 = 81,244.95/x
  3. Step 3: Cross multiply
    135,729.96x = 187,242.39 × 81,244.95
  4. Step 4: Simplify right side
    135,729.96x = 15,212,498,613.43
  5. Step 5: Solve for x
    x = 15,212,498,613.43/135,729.96
  6. Step 6: Final answer
    x = 112,079.15

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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.