Home / 143,834.52-198,498.36-80,172.78

Finding the Fourth Proportional to 143,834.52, 198,498.36 and 80,172.78

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Solution

The fourth proportional to 143,834.52, 198,498.36 and 80,172.78 is: 110,642.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,834.52 : 198,498.36 = 80,172.78 : x
  2. Step 2: Convert to fraction form
    143,834.52/198,498.36 = 80,172.78/x
  3. Step 3: Cross multiply
    143,834.52x = 198,498.36 × 80,172.78
  4. Step 4: Simplify right side
    143,834.52x = 15,914,165,346.64
  5. Step 5: Solve for x
    x = 15,914,165,346.64/143,834.52
  6. Step 6: Final answer
    x = 110,642.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.