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Finding the Fourth Proportional to 69,132.90, 103,699.29 and 19,212.97

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Solution

The fourth proportional to 69,132.90, 103,699.29 and 19,212.97 is: 28,819.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,132.90 : 103,699.29 = 19,212.97 : x
  2. Step 2: Convert to fraction form
    69,132.90/103,699.29 = 19,212.97/x
  3. Step 3: Cross multiply
    69,132.90x = 103,699.29 × 19,212.97
  4. Step 4: Simplify right side
    69,132.90x = 1,992,371,347.79
  5. Step 5: Solve for x
    x = 1,992,371,347.79/69,132.90
  6. Step 6: Final answer
    x = 28,819.44

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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.