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Finding the Fourth Proportional to 138,049.80, 207,074.70 and 71,510.33

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Solution

The fourth proportional to 138,049.80, 207,074.70 and 71,510.33 is: 107,265.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,049.80 : 207,074.70 = 71,510.33 : x
  2. Step 2: Convert to fraction form
    138,049.80/207,074.70 = 71,510.33/x
  3. Step 3: Cross multiply
    138,049.80x = 207,074.70 × 71,510.33
  4. Step 4: Simplify right side
    138,049.80x = 14,807,979,096.28
  5. Step 5: Solve for x
    x = 14,807,979,096.28/138,049.80
  6. Step 6: Final answer
    x = 107,265.49

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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.