Home / 143,764.11-198,395.78-79,235.64

Finding the Fourth Proportional to 143,764.11, 198,395.78 and 79,235.64

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Solution

The fourth proportional to 143,764.11, 198,395.78 and 79,235.64 is: 109,345.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,764.11 : 198,395.78 = 79,235.64 : x
  2. Step 2: Convert to fraction form
    143,764.11/198,395.78 = 79,235.64/x
  3. Step 3: Cross multiply
    143,764.11x = 198,395.78 × 79,235.64
  4. Step 4: Simplify right side
    143,764.11x = 15,720,016,205.42
  5. Step 5: Solve for x
    x = 15,720,016,205.42/143,764.11
  6. Step 6: Final answer
    x = 109,345.90

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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.