Home / 139,575.12-192,570.20-79,141.02

Finding the Fourth Proportional to 139,575.12, 192,570.20 and 79,141.02

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Solution

The fourth proportional to 139,575.12, 192,570.20 and 79,141.02 is: 109,189.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,575.12 : 192,570.20 = 79,141.02 : x
  2. Step 2: Convert to fraction form
    139,575.12/192,570.20 = 79,141.02/x
  3. Step 3: Cross multiply
    139,575.12x = 192,570.20 × 79,141.02
  4. Step 4: Simplify right side
    139,575.12x = 15,240,202,049.60
  5. Step 5: Solve for x
    x = 15,240,202,049.60/139,575.12
  6. Step 6: Final answer
    x = 109,189.96

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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.