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Finding the Fourth Proportional to 109,039.56, 150,448.32 and 63,691.80

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Solution

The fourth proportional to 109,039.56, 150,448.32 and 63,691.80 is: 87,879.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,039.56 : 150,448.32 = 63,691.80 : x
  2. Step 2: Convert to fraction form
    109,039.56/150,448.32 = 63,691.80/x
  3. Step 3: Cross multiply
    109,039.56x = 150,448.32 × 63,691.80
  4. Step 4: Simplify right side
    109,039.56x = 9,582,324,307.78
  5. Step 5: Solve for x
    x = 9,582,324,307.78/109,039.56
  6. Step 6: Final answer
    x = 87,879.34

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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.