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Finding the Fourth Proportional to 138,336.56, 207,340.80 and 124,230.40

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Solution

The fourth proportional to 138,336.56, 207,340.80 and 124,230.40 is: 186,198.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,336.56 : 207,340.80 = 124,230.40 : x
  2. Step 2: Convert to fraction form
    138,336.56/207,340.80 = 124,230.40/x
  3. Step 3: Cross multiply
    138,336.56x = 207,340.80 × 124,230.40
  4. Step 4: Simplify right side
    138,336.56x = 25,758,030,520.32
  5. Step 5: Solve for x
    x = 25,758,030,520.32/138,336.56
  6. Step 6: Final answer
    x = 186,198.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.