Home / 128,748.20-193,640.70-115,269.80

Finding the Fourth Proportional to 128,748.20, 193,640.70 and 115,269.80

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Solution

The fourth proportional to 128,748.20, 193,640.70 and 115,269.80 is: 173,368.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,748.20 : 193,640.70 = 115,269.80 : x
  2. Step 2: Convert to fraction form
    128,748.20/193,640.70 = 115,269.80/x
  3. Step 3: Cross multiply
    128,748.20x = 193,640.70 × 115,269.80
  4. Step 4: Simplify right side
    128,748.20x = 22,320,924,760.86
  5. Step 5: Solve for x
    x = 22,320,924,760.86/128,748.20
  6. Step 6: Final answer
    x = 173,368.83

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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.