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Finding the Fourth Proportional to 149,672.80, 206,583.92 and 86,047.56

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Solution

The fourth proportional to 149,672.80, 206,583.92 and 86,047.56 is: 118,766.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,672.80 : 206,583.92 = 86,047.56 : x
  2. Step 2: Convert to fraction form
    149,672.80/206,583.92 = 86,047.56/x
  3. Step 3: Cross multiply
    149,672.80x = 206,583.92 × 86,047.56
  4. Step 4: Simplify right side
    149,672.80x = 17,776,042,251.24
  5. Step 5: Solve for x
    x = 17,776,042,251.24/149,672.80
  6. Step 6: Final answer
    x = 118,766.02

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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.