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Finding the Fourth Proportional to 143,686.01, 198,286.70 and 80,023.80

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Solution

The fourth proportional to 143,686.01, 198,286.70 and 80,023.80 is: 110,432.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,686.01 : 198,286.70 = 80,023.80 : x
  2. Step 2: Convert to fraction form
    143,686.01/198,286.70 = 80,023.80/x
  3. Step 3: Cross multiply
    143,686.01x = 198,286.70 × 80,023.80
  4. Step 4: Simplify right side
    143,686.01x = 15,867,654,823.34
  5. Step 5: Solve for x
    x = 15,867,654,823.34/143,686.01
  6. Step 6: Final answer
    x = 110,432.85

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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.