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Finding the Fourth Proportional to 71,362.20, 107,043.30 and 68,081.70

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Solution

The fourth proportional to 71,362.20, 107,043.30 and 68,081.70 is: 102,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,362.20 : 107,043.30 = 68,081.70 : x
  2. Step 2: Convert to fraction form
    71,362.20/107,043.30 = 68,081.70/x
  3. Step 3: Cross multiply
    71,362.20x = 107,043.30 × 68,081.70
  4. Step 4: Simplify right side
    71,362.20x = 7,287,689,837.61
  5. Step 5: Solve for x
    x = 7,287,689,837.61/71,362.20
  6. Step 6: Final answer
    x = 102,122.55

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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.