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Finding the Fourth Proportional to 73,761.19, 110,638.92 and 21,170.68

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Solution

The fourth proportional to 73,761.19, 110,638.92 and 21,170.68 is: 31,755.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,761.19 : 110,638.92 = 21,170.68 : x
  2. Step 2: Convert to fraction form
    73,761.19/110,638.92 = 21,170.68/x
  3. Step 3: Cross multiply
    73,761.19x = 110,638.92 × 21,170.68
  4. Step 4: Simplify right side
    73,761.19x = 2,342,301,170.87
  5. Step 5: Solve for x
    x = 2,342,301,170.87/73,761.19
  6. Step 6: Final answer
    x = 31,755.20

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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.