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Finding the Fourth Proportional to 52,939.80, 79,408.67 and 21,349.15

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Solution

The fourth proportional to 52,939.80, 79,408.67 and 21,349.15 is: 32,023.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,939.80 : 79,408.67 = 21,349.15 : x
  2. Step 2: Convert to fraction form
    52,939.80/79,408.67 = 21,349.15/x
  3. Step 3: Cross multiply
    52,939.80x = 79,408.67 × 21,349.15
  4. Step 4: Simplify right side
    52,939.80x = 1,695,307,759.76
  5. Step 5: Solve for x
    x = 1,695,307,759.76/52,939.80
  6. Step 6: Final answer
    x = 32,023.31

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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.