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Finding the Fourth Proportional to 80,543.92, 120,815.96 and 30,612.28

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Solution

The fourth proportional to 80,543.92, 120,815.96 and 30,612.28 is: 45,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,543.92 : 120,815.96 = 30,612.28 : x
  2. Step 2: Convert to fraction form
    80,543.92/120,815.96 = 30,612.28/x
  3. Step 3: Cross multiply
    80,543.92x = 120,815.96 × 30,612.28
  4. Step 4: Simplify right side
    80,543.92x = 3,698,451,995.99
  5. Step 5: Solve for x
    x = 3,698,451,995.99/80,543.92
  6. Step 6: Final answer
    x = 45,918.45

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1.5x scale

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.