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Finding the Fourth Proportional to 68,679.92, 94,780.38 and 38,465.16

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Solution

The fourth proportional to 68,679.92, 94,780.38 and 38,465.16 is: 53,083.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.92 : 94,780.38 = 38,465.16 : x
  2. Step 2: Convert to fraction form
    68,679.92/94,780.38 = 38,465.16/x
  3. Step 3: Cross multiply
    68,679.92x = 94,780.38 × 38,465.16
  4. Step 4: Simplify right side
    68,679.92x = 3,645,742,481.56
  5. Step 5: Solve for x
    x = 3,645,742,481.56/68,679.92
  6. Step 6: Final answer
    x = 53,083.10

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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.