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Finding the Fourth Proportional to 108,954.92, 150,226.96 and 78,691.88

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Solution

The fourth proportional to 108,954.92, 150,226.96 and 78,691.88 is: 108,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,954.92 : 150,226.96 = 78,691.88 : x
  2. Step 2: Convert to fraction form
    108,954.92/150,226.96 = 78,691.88/x
  3. Step 3: Cross multiply
    108,954.92x = 150,226.96 × 78,691.88
  4. Step 4: Simplify right side
    108,954.92x = 11,821,641,909.08
  5. Step 5: Solve for x
    x = 11,821,641,909.08/108,954.92
  6. Step 6: Final answer
    x = 108,500.30

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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.