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Finding the Fourth Proportional to 73,761.69, 110,639.67 and 21,171.18

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Solution

The fourth proportional to 73,761.69, 110,639.67 and 21,171.18 is: 31,755.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,761.69 : 110,639.67 = 21,171.18 : x
  2. Step 2: Convert to fraction form
    73,761.69/110,639.67 = 21,171.18/x
  3. Step 3: Cross multiply
    73,761.69x = 110,639.67 × 21,171.18
  4. Step 4: Simplify right side
    73,761.69x = 2,342,372,368.71
  5. Step 5: Solve for x
    x = 2,342,372,368.71/73,761.69
  6. Step 6: Final answer
    x = 31,755.95

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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.