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Finding the Fourth Proportional to 138,361.65, 206,395.99 and 134,282.89

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Solution

The fourth proportional to 138,361.65, 206,395.99 and 134,282.89 is: 200,311.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,361.65 : 206,395.99 = 134,282.89 : x
  2. Step 2: Convert to fraction form
    138,361.65/206,395.99 = 134,282.89/x
  3. Step 3: Cross multiply
    138,361.65x = 206,395.99 × 134,282.89
  4. Step 4: Simplify right side
    138,361.65x = 27,715,450,021.61
  5. Step 5: Solve for x
    x = 27,715,450,021.61/138,361.65
  6. Step 6: Final answer
    x = 200,311.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.