Home / 281,318.26-421,964.43-103,813.78

Finding the Fourth Proportional to 281,318.26, 421,964.43 and 103,813.78

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Solution

The fourth proportional to 281,318.26, 421,964.43 and 103,813.78 is: 155,715.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,318.26 : 421,964.43 = 103,813.78 : x
  2. Step 2: Convert to fraction form
    281,318.26/421,964.43 = 103,813.78/x
  3. Step 3: Cross multiply
    281,318.26x = 421,964.43 × 103,813.78
  4. Step 4: Simplify right side
    281,318.26x = 43,805,722,503.85
  5. Step 5: Solve for x
    x = 43,805,722,503.85/281,318.26
  6. Step 6: Final answer
    x = 155,715.89

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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.