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Finding the Fourth Proportional to 48,658.40, 72,872.40 and 32,991.20

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Solution

The fourth proportional to 48,658.40, 72,872.40 and 32,991.20 is: 49,408.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,658.40 : 72,872.40 = 32,991.20 : x
  2. Step 2: Convert to fraction form
    48,658.40/72,872.40 = 32,991.20/x
  3. Step 3: Cross multiply
    48,658.40x = 72,872.40 × 32,991.20
  4. Step 4: Simplify right side
    48,658.40x = 2,404,147,922.88
  5. Step 5: Solve for x
    x = 2,404,147,922.88/48,658.40
  6. Step 6: Final answer
    x = 49,408.69

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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.