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Finding the Fourth Proportional to 71,394.70, 107,092.05 and 68,114.20

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Solution

The fourth proportional to 71,394.70, 107,092.05 and 68,114.20 is: 102,171.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,394.70 : 107,092.05 = 68,114.20 : x
  2. Step 2: Convert to fraction form
    71,394.70/107,092.05 = 68,114.20/x
  3. Step 3: Cross multiply
    71,394.70x = 107,092.05 × 68,114.20
  4. Step 4: Simplify right side
    71,394.70x = 7,294,489,312.11
  5. Step 5: Solve for x
    x = 7,294,489,312.11/71,394.70
  6. Step 6: Final answer
    x = 102,171.30

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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.