Home / 149,412.25-206,191.88-81,428.95

Finding the Fourth Proportional to 149,412.25, 206,191.88 and 81,428.95

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Solution

The fourth proportional to 149,412.25, 206,191.88 and 81,428.95 is: 112,373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,412.25 : 206,191.88 = 81,428.95 : x
  2. Step 2: Convert to fraction form
    149,412.25/206,191.88 = 81,428.95/x
  3. Step 3: Cross multiply
    149,412.25x = 206,191.88 × 81,428.95
  4. Step 4: Simplify right side
    149,412.25x = 16,789,988,286.93
  5. Step 5: Solve for x
    x = 16,789,988,286.93/149,412.25
  6. Step 6: Final answer
    x = 112,373.57

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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.