Home / 143,715.31-198,342.75-79,191.21

Finding the Fourth Proportional to 143,715.31, 198,342.75 and 79,191.21

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Solution

The fourth proportional to 143,715.31, 198,342.75 and 79,191.21 is: 109,292.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,715.31 : 198,342.75 = 79,191.21 : x
  2. Step 2: Convert to fraction form
    143,715.31/198,342.75 = 79,191.21/x
  3. Step 3: Cross multiply
    143,715.31x = 198,342.75 × 79,191.21
  4. Step 4: Simplify right side
    143,715.31x = 15,707,002,367.23
  5. Step 5: Solve for x
    x = 15,707,002,367.23/143,715.31
  6. Step 6: Final answer
    x = 109,292.48

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1.5x scale

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.