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Finding the Fourth Proportional to 61,172.78, 84,425.84 and 34,310.21

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Solution

The fourth proportional to 61,172.78, 84,425.84 and 34,310.21 is: 47,352.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,172.78 : 84,425.84 = 34,310.21 : x
  2. Step 2: Convert to fraction form
    61,172.78/84,425.84 = 34,310.21/x
  3. Step 3: Cross multiply
    61,172.78x = 84,425.84 × 34,310.21
  4. Step 4: Simplify right side
    61,172.78x = 2,896,667,706.15
  5. Step 5: Solve for x
    x = 2,896,667,706.15/61,172.78
  6. Step 6: Final answer
    x = 47,352.24

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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.