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Finding the Fourth Proportional to 68,903.10, 95,078.88 and 38,691.72

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Solution

The fourth proportional to 68,903.10, 95,078.88 and 38,691.72 is: 53,390.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,903.10 : 95,078.88 = 38,691.72 : x
  2. Step 2: Convert to fraction form
    68,903.10/95,078.88 = 38,691.72/x
  3. Step 3: Cross multiply
    68,903.10x = 95,078.88 × 38,691.72
  4. Step 4: Simplify right side
    68,903.10x = 3,678,765,402.87
  5. Step 5: Solve for x
    x = 3,678,765,402.87/68,903.10
  6. Step 6: Final answer
    x = 53,390.42

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1.5x scale

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.