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Finding the Fourth Proportional to 138,323.80, 207,194.10 and 123,549.40

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Solution

The fourth proportional to 138,323.80, 207,194.10 and 123,549.40 is: 185,063.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,323.80 : 207,194.10 = 123,549.40 : x
  2. Step 2: Convert to fraction form
    138,323.80/207,194.10 = 123,549.40/x
  3. Step 3: Cross multiply
    138,323.80x = 207,194.10 × 123,549.40
  4. Step 4: Simplify right side
    138,323.80x = 25,598,706,738.54
  5. Step 5: Solve for x
    x = 25,598,706,738.54/138,323.80
  6. Step 6: Final answer
    x = 185,063.65

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1.5x scale

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.