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Finding the Fourth Proportional to 61,340.78, 84,651.12 and 34,481.72

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Solution

The fourth proportional to 61,340.78, 84,651.12 and 34,481.72 is: 47,585.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,340.78 : 84,651.12 = 34,481.72 : x
  2. Step 2: Convert to fraction form
    61,340.78/84,651.12 = 34,481.72/x
  3. Step 3: Cross multiply
    61,340.78x = 84,651.12 × 34,481.72
  4. Step 4: Simplify right side
    61,340.78x = 2,918,916,217.53
  5. Step 5: Solve for x
    x = 2,918,916,217.53/61,340.78
  6. Step 6: Final answer
    x = 47,585.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.