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Finding the Fourth Proportional to 71,959.48, 107,929.46 and 19,372.12

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Solution

The fourth proportional to 71,959.48, 107,929.46 and 19,372.12 is: 29,055.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,959.48 : 107,929.46 = 19,372.12 : x
  2. Step 2: Convert to fraction form
    71,959.48/107,929.46 = 19,372.12/x
  3. Step 3: Cross multiply
    71,959.48x = 107,929.46 × 19,372.12
  4. Step 4: Simplify right side
    71,959.48x = 2,090,822,450.66
  5. Step 5: Solve for x
    x = 2,090,822,450.66/71,959.48
  6. Step 6: Final answer
    x = 29,055.55

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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.