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Finding the Fourth Proportional to 48,663.81, 67,121.49 and 31,636.65

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Solution

The fourth proportional to 48,663.81, 67,121.49 and 31,636.65 is: 43,636.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,663.81 : 67,121.49 = 31,636.65 : x
  2. Step 2: Convert to fraction form
    48,663.81/67,121.49 = 31,636.65/x
  3. Step 3: Cross multiply
    48,663.81x = 67,121.49 × 31,636.65
  4. Step 4: Simplify right side
    48,663.81x = 2,123,499,086.61
  5. Step 5: Solve for x
    x = 2,123,499,086.61/48,663.81
  6. Step 6: Final answer
    x = 43,636.10

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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.