Home / 143,705.13-198,313.14-83,310.78

Finding the Fourth Proportional to 143,705.13, 198,313.14 and 83,310.78

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Solution

The fourth proportional to 143,705.13, 198,313.14 and 83,310.78 is: 114,968.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,705.13 : 198,313.14 = 83,310.78 : x
  2. Step 2: Convert to fraction form
    143,705.13/198,313.14 = 83,310.78/x
  3. Step 3: Cross multiply
    143,705.13x = 198,313.14 × 83,310.78
  4. Step 4: Simplify right side
    143,705.13x = 16,521,622,377.65
  5. Step 5: Solve for x
    x = 16,521,622,377.65/143,705.13
  6. Step 6: Final answer
    x = 114,968.91

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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.