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Finding the Fourth Proportional to 138,364.20, 207,546.30 and 68,380.20

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Solution

The fourth proportional to 138,364.20, 207,546.30 and 68,380.20 is: 102,570.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,364.20 : 207,546.30 = 68,380.20 : x
  2. Step 2: Convert to fraction form
    138,364.20/207,546.30 = 68,380.20/x
  3. Step 3: Cross multiply
    138,364.20x = 207,546.30 × 68,380.20
  4. Step 4: Simplify right side
    138,364.20x = 14,192,057,503.26
  5. Step 5: Solve for x
    x = 14,192,057,503.26/138,364.20
  6. Step 6: Final answer
    x = 102,570.30

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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.