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Finding the Fourth Proportional to 68,707, 94,815.67 and 38,899

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Solution

The fourth proportional to 68,707, 94,815.67 and 38,899 is: 53,680.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,707 : 94,815.67 = 38,899 : x
  2. Step 2: Convert to fraction form
    68,707/94,815.67 = 38,899/x
  3. Step 3: Cross multiply
    68,707x = 94,815.67 × 38,899
  4. Step 4: Simplify right side
    68,707x = 3,688,234,747.33
  5. Step 5: Solve for x
    x = 3,688,234,747.33/68,707
  6. Step 6: Final answer
    x = 53,680.63

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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.