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Finding the Fourth Proportional to 79,445.22, 119,167.79 and 20,280.87

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Solution

The fourth proportional to 79,445.22, 119,167.79 and 20,280.87 is: 30,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,445.22 : 119,167.79 = 20,280.87 : x
  2. Step 2: Convert to fraction form
    79,445.22/119,167.79 = 20,280.87/x
  3. Step 3: Cross multiply
    79,445.22x = 119,167.79 × 20,280.87
  4. Step 4: Simplify right side
    79,445.22x = 2,416,826,431.83
  5. Step 5: Solve for x
    x = 2,416,826,431.83/79,445.22
  6. Step 6: Final answer
    x = 30,421.29

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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.