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Finding the Fourth Proportional to 80,064.29, 120,092.11 and 40,620.40

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Solution

The fourth proportional to 80,064.29, 120,092.11 and 40,620.40 is: 60,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,064.29 : 120,092.11 = 40,620.40 : x
  2. Step 2: Convert to fraction form
    80,064.29/120,092.11 = 40,620.40/x
  3. Step 3: Cross multiply
    80,064.29x = 120,092.11 × 40,620.40
  4. Step 4: Simplify right side
    80,064.29x = 4,878,189,143.26
  5. Step 5: Solve for x
    x = 4,878,189,143.26/80,064.29
  6. Step 6: Final answer
    x = 60,928.40

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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.