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Finding the Fourth Proportional to 138,133.96, 206,815.14 and 74,727.34

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Solution

The fourth proportional to 138,133.96, 206,815.14 and 74,727.34 is: 111,882.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,133.96 : 206,815.14 = 74,727.34 : x
  2. Step 2: Convert to fraction form
    138,133.96/206,815.14 = 74,727.34/x
  3. Step 3: Cross multiply
    138,133.96x = 206,815.14 × 74,727.34
  4. Step 4: Simplify right side
    138,133.96x = 15,454,745,283.93
  5. Step 5: Solve for x
    x = 15,454,745,283.93/138,133.96
  6. Step 6: Final answer
    x = 111,882.30

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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.