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Finding the Fourth Proportional to 48,900.72, 67,480.96 and 27,681.20

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Solution

The fourth proportional to 48,900.72, 67,480.96 and 27,681.20 is: 38,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,900.72 : 67,480.96 = 27,681.20 : x
  2. Step 2: Convert to fraction form
    48,900.72/67,480.96 = 27,681.20/x
  3. Step 3: Cross multiply
    48,900.72x = 67,480.96 × 27,681.20
  4. Step 4: Simplify right side
    48,900.72x = 1,867,953,949.95
  5. Step 5: Solve for x
    x = 1,867,953,949.95/48,900.72
  6. Step 6: Final answer
    x = 38,198.90

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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.