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Finding the Fourth Proportional to 80,696.64, 121,100.64 and 28,106.56

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Solution

The fourth proportional to 80,696.64, 121,100.64 and 28,106.56 is: 42,179.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,696.64 : 121,100.64 = 28,106.56 : x
  2. Step 2: Convert to fraction form
    80,696.64/121,100.64 = 28,106.56/x
  3. Step 3: Cross multiply
    80,696.64x = 121,100.64 × 28,106.56
  4. Step 4: Simplify right side
    80,696.64x = 3,403,722,404.20
  5. Step 5: Solve for x
    x = 3,403,722,404.20/80,696.64
  6. Step 6: Final answer
    x = 42,179.23

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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.