Home / 80,875.14-121,296-21,696.78

Finding the Fourth Proportional to 80,875.14, 121,296 and 21,696.78

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Solution

The fourth proportional to 80,875.14, 121,296 and 21,696.78 is: 32,540.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,875.14 : 121,296 = 21,696.78 : x
  2. Step 2: Convert to fraction form
    80,875.14/121,296 = 21,696.78/x
  3. Step 3: Cross multiply
    80,875.14x = 121,296 × 21,696.78
  4. Step 4: Simplify right side
    80,875.14x = 2,631,732,626.88
  5. Step 5: Solve for x
    x = 2,631,732,626.88/80,875.14
  6. Step 6: Final answer
    x = 32,540.69

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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.