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Finding the Fourth Proportional to 48,658.71, 67,149.90 and 28,521.30

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Solution

The fourth proportional to 48,658.71, 67,149.90 and 28,521.30 is: 39,359.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,658.71 : 67,149.90 = 28,521.30 : x
  2. Step 2: Convert to fraction form
    48,658.71/67,149.90 = 28,521.30/x
  3. Step 3: Cross multiply
    48,658.71x = 67,149.90 × 28,521.30
  4. Step 4: Simplify right side
    48,658.71x = 1,915,202,539.44
  5. Step 5: Solve for x
    x = 1,915,202,539.44/48,658.71
  6. Step 6: Final answer
    x = 39,359.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.