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Finding the Fourth Proportional to 70,974.71, 106,280.26 and 68,872.49

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Solution

The fourth proportional to 70,974.71, 106,280.26 and 68,872.49 is: 103,132.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,974.71 : 106,280.26 = 68,872.49 : x
  2. Step 2: Convert to fraction form
    70,974.71/106,280.26 = 68,872.49/x
  3. Step 3: Cross multiply
    70,974.71x = 106,280.26 × 68,872.49
  4. Step 4: Simplify right side
    70,974.71x = 7,319,786,144.05
  5. Step 5: Solve for x
    x = 7,319,786,144.05/70,974.71
  6. Step 6: Final answer
    x = 103,132.31

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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.