Home / 143,553.42-198,101.78-79,891.20

Finding the Fourth Proportional to 143,553.42, 198,101.78 and 79,891.20

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Solution

The fourth proportional to 143,553.42, 198,101.78 and 79,891.20 is: 110,248.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,553.42 : 198,101.78 = 79,891.20 : x
  2. Step 2: Convert to fraction form
    143,553.42/198,101.78 = 79,891.20/x
  3. Step 3: Cross multiply
    143,553.42x = 198,101.78 × 79,891.20
  4. Step 4: Simplify right side
    143,553.42x = 15,826,587,935.83
  5. Step 5: Solve for x
    x = 15,826,587,935.83/143,553.42
  6. Step 6: Final answer
    x = 110,248.77

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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.