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Finding the Fourth Proportional to 80,728.36, 121,119.90 and 35,743.52

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Solution

The fourth proportional to 80,728.36, 121,119.90 and 35,743.52 is: 53,627.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,728.36 : 121,119.90 = 35,743.52 : x
  2. Step 2: Convert to fraction form
    80,728.36/121,119.90 = 35,743.52/x
  3. Step 3: Cross multiply
    80,728.36x = 121,119.90 × 35,743.52
  4. Step 4: Simplify right side
    80,728.36x = 4,329,251,207.17
  5. Step 5: Solve for x
    x = 4,329,251,207.17/80,728.36
  6. Step 6: Final answer
    x = 53,627.39

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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.