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Finding the Fourth Proportional to 79,518.42, 119,274.90 and 20,354.61

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Solution

The fourth proportional to 79,518.42, 119,274.90 and 20,354.61 is: 30,531.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,518.42 : 119,274.90 = 20,354.61 : x
  2. Step 2: Convert to fraction form
    79,518.42/119,274.90 = 20,354.61/x
  3. Step 3: Cross multiply
    79,518.42x = 119,274.90 × 20,354.61
  4. Step 4: Simplify right side
    79,518.42x = 2,427,793,475.91
  5. Step 5: Solve for x
    x = 2,427,793,475.91/79,518.42
  6. Step 6: Final answer
    x = 30,531.21

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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.