Home / 143,683.20-198,275.02-79,139.88

Finding the Fourth Proportional to 143,683.20, 198,275.02 and 79,139.88

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Solution

The fourth proportional to 143,683.20, 198,275.02 and 79,139.88 is: 109,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,683.20 : 198,275.02 = 79,139.88 : x
  2. Step 2: Convert to fraction form
    143,683.20/198,275.02 = 79,139.88/x
  3. Step 3: Cross multiply
    143,683.20x = 198,275.02 × 79,139.88
  4. Step 4: Simplify right side
    143,683.20x = 15,691,461,289.80
  5. Step 5: Solve for x
    x = 15,691,461,289.80/143,683.20
  6. Step 6: Final answer
    x = 109,208.74

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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.