Home / 143,998.43-198,728.98-79,480.31

Finding the Fourth Proportional to 143,998.43, 198,728.98 and 79,480.31

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Solution

The fourth proportional to 143,998.43, 198,728.98 and 79,480.31 is: 109,688.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,998.43 : 198,728.98 = 79,480.31 : x
  2. Step 2: Convert to fraction form
    143,998.43/198,728.98 = 79,480.31/x
  3. Step 3: Cross multiply
    143,998.43x = 198,728.98 × 79,480.31
  4. Step 4: Simplify right side
    143,998.43x = 15,795,039,744.04
  5. Step 5: Solve for x
    x = 15,795,039,744.04/143,998.43
  6. Step 6: Final answer
    x = 109,688.98

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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.