Home / 280,891.22-421,139.99-103,375.17

Finding the Fourth Proportional to 280,891.22, 421,139.99 and 103,375.17

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Solution

The fourth proportional to 280,891.22, 421,139.99 and 103,375.17 is: 154,990.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,891.22 : 421,139.99 = 103,375.17 : x
  2. Step 2: Convert to fraction form
    280,891.22/421,139.99 = 103,375.17/x
  3. Step 3: Cross multiply
    280,891.22x = 421,139.99 × 103,375.17
  4. Step 4: Simplify right side
    280,891.22x = 43,535,418,318.49
  5. Step 5: Solve for x
    x = 43,535,418,318.49/280,891.22
  6. Step 6: Final answer
    x = 154,990.32

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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.