Home / 149,419.27-206,192.57-81,434.78

Finding the Fourth Proportional to 149,419.27, 206,192.57 and 81,434.78

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Solution

The fourth proportional to 149,419.27, 206,192.57 and 81,434.78 is: 112,376.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,419.27 : 206,192.57 = 81,434.78 : x
  2. Step 2: Convert to fraction form
    149,419.27/206,192.57 = 81,434.78/x
  3. Step 3: Cross multiply
    149,419.27x = 206,192.57 × 81,434.78
  4. Step 4: Simplify right side
    149,419.27x = 16,791,246,575.58
  5. Step 5: Solve for x
    x = 16,791,246,575.58/149,419.27
  6. Step 6: Final answer
    x = 112,376.71

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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.