Home / 143,718.10-198,331.16-78,306.62

Finding the Fourth Proportional to 143,718.10, 198,331.16 and 78,306.62

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Solution

The fourth proportional to 143,718.10, 198,331.16 and 78,306.62 is: 108,063.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,718.10 : 198,331.16 = 78,306.62 : x
  2. Step 2: Convert to fraction form
    143,718.10/198,331.16 = 78,306.62/x
  3. Step 3: Cross multiply
    143,718.10x = 198,331.16 × 78,306.62
  4. Step 4: Simplify right side
    143,718.10x = 15,530,641,397.09
  5. Step 5: Solve for x
    x = 15,530,641,397.09/143,718.10
  6. Step 6: Final answer
    x = 108,063.23

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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.