Home / 138,013.62-206,814.96-71,364.78

Finding the Fourth Proportional to 138,013.62, 206,814.96 and 71,364.78

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Solution

The fourth proportional to 138,013.62, 206,814.96 and 71,364.78 is: 106,940.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,013.62 : 206,814.96 = 71,364.78 : x
  2. Step 2: Convert to fraction form
    138,013.62/206,814.96 = 71,364.78/x
  3. Step 3: Cross multiply
    138,013.62x = 206,814.96 × 71,364.78
  4. Step 4: Simplify right side
    138,013.62x = 14,759,304,121.11
  5. Step 5: Solve for x
    x = 14,759,304,121.11/138,013.62
  6. Step 6: Final answer
    x = 106,940.92

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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.