Home / 143,683.89-198,275.97-79,140.57

Finding the Fourth Proportional to 143,683.89, 198,275.97 and 79,140.57

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Solution

The fourth proportional to 143,683.89, 198,275.97 and 79,140.57 is: 109,209.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,683.89 : 198,275.97 = 79,140.57 : x
  2. Step 2: Convert to fraction form
    143,683.89/198,275.97 = 79,140.57/x
  3. Step 3: Cross multiply
    143,683.89x = 198,275.97 × 79,140.57
  4. Step 4: Simplify right side
    143,683.89x = 15,691,673,283.10
  5. Step 5: Solve for x
    x = 15,691,673,283.10/143,683.89
  6. Step 6: Final answer
    x = 109,209.69

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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.