Home / 128,899.20-193,348.80-79,747.20

Finding the Fourth Proportional to 128,899.20, 193,348.80 and 79,747.20

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Solution

The fourth proportional to 128,899.20, 193,348.80 and 79,747.20 is: 119,620.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,899.20 : 193,348.80 = 79,747.20 : x
  2. Step 2: Convert to fraction form
    128,899.20/193,348.80 = 79,747.20/x
  3. Step 3: Cross multiply
    128,899.20x = 193,348.80 × 79,747.20
  4. Step 4: Simplify right side
    128,899.20x = 15,419,025,423.36
  5. Step 5: Solve for x
    x = 15,419,025,423.36/128,899.20
  6. Step 6: Final answer
    x = 119,620.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.