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Finding the Fourth Proportional to 71,374.20, 107,061.30 and 68,093.70

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Solution

The fourth proportional to 71,374.20, 107,061.30 and 68,093.70 is: 102,140.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,374.20 : 107,061.30 = 68,093.70 : x
  2. Step 2: Convert to fraction form
    71,374.20/107,061.30 = 68,093.70/x
  3. Step 3: Cross multiply
    71,374.20x = 107,061.30 × 68,093.70
  4. Step 4: Simplify right side
    71,374.20x = 7,290,200,043.81
  5. Step 5: Solve for x
    x = 7,290,200,043.81/71,374.20
  6. Step 6: Final answer
    x = 102,140.55

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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.