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Finding the Fourth Proportional to 72,113.92, 108,170.96 and 18,805.85

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Solution

The fourth proportional to 72,113.92, 108,170.96 and 18,805.85 is: 28,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,113.92 : 108,170.96 = 18,805.85 : x
  2. Step 2: Convert to fraction form
    72,113.92/108,170.96 = 18,805.85/x
  3. Step 3: Cross multiply
    72,113.92x = 108,170.96 × 18,805.85
  4. Step 4: Simplify right side
    72,113.92x = 2,034,246,848.12
  5. Step 5: Solve for x
    x = 2,034,246,848.12/72,113.92
  6. Step 6: Final answer
    x = 28,208.80

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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.