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Finding the Fourth Proportional to 169,343.87, 253,983.40 and 85,080.68

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Solution

The fourth proportional to 169,343.87, 253,983.40 and 85,080.68 is: 127,604.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,343.87 : 253,983.40 = 85,080.68 : x
  2. Step 2: Convert to fraction form
    169,343.87/253,983.40 = 85,080.68/x
  3. Step 3: Cross multiply
    169,343.87x = 253,983.40 × 85,080.68
  4. Step 4: Simplify right side
    169,343.87x = 21,609,079,850.53
  5. Step 5: Solve for x
    x = 21,609,079,850.53/169,343.87
  6. Step 6: Final answer
    x = 127,604.74

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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.