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Finding the Fourth Proportional to 75,294.72, 112,940.16 and 19,891.20

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Solution

The fourth proportional to 75,294.72, 112,940.16 and 19,891.20 is: 29,836.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,294.72 : 112,940.16 = 19,891.20 : x
  2. Step 2: Convert to fraction form
    75,294.72/112,940.16 = 19,891.20/x
  3. Step 3: Cross multiply
    75,294.72x = 112,940.16 × 19,891.20
  4. Step 4: Simplify right side
    75,294.72x = 2,246,515,310.59
  5. Step 5: Solve for x
    x = 2,246,515,310.59/75,294.72
  6. Step 6: Final answer
    x = 29,836.29

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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.