Home / 139,418.74-192,397.40-79,000.90

Finding the Fourth Proportional to 139,418.74, 192,397.40 and 79,000.90

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Solution

The fourth proportional to 139,418.74, 192,397.40 and 79,000.90 is: 109,020.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.74 : 192,397.40 = 79,000.90 : x
  2. Step 2: Convert to fraction form
    139,418.74/192,397.40 = 79,000.90/x
  3. Step 3: Cross multiply
    139,418.74x = 192,397.40 × 79,000.90
  4. Step 4: Simplify right side
    139,418.74x = 15,199,568,185.33
  5. Step 5: Solve for x
    x = 15,199,568,185.33/139,418.74
  6. Step 6: Final answer
    x = 109,020.98

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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.