Home / 281,003.43-421,307.97-103,487.65

Finding the Fourth Proportional to 281,003.43, 421,307.97 and 103,487.65

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Solution

The fourth proportional to 281,003.43, 421,307.97 and 103,487.65 is: 155,158.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,003.43 : 421,307.97 = 103,487.65 : x
  2. Step 2: Convert to fraction form
    281,003.43/421,307.97 = 103,487.65/x
  3. Step 3: Cross multiply
    281,003.43x = 421,307.97 × 103,487.65
  4. Step 4: Simplify right side
    281,003.43x = 43,600,171,741.57
  5. Step 5: Solve for x
    x = 43,600,171,741.57/281,003.43
  6. Step 6: Final answer
    x = 155,158.86

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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.