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Finding the Fourth Proportional to 169,323.09, 253,998.45 and 85,039.90

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Solution

The fourth proportional to 169,323.09, 253,998.45 and 85,039.90 is: 127,566.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,323.09 : 253,998.45 = 85,039.90 : x
  2. Step 2: Convert to fraction form
    169,323.09/253,998.45 = 85,039.90/x
  3. Step 3: Cross multiply
    169,323.09x = 253,998.45 × 85,039.90
  4. Step 4: Simplify right side
    169,323.09x = 21,600,002,788.16
  5. Step 5: Solve for x
    x = 21,600,002,788.16/169,323.09
  6. Step 6: Final answer
    x = 127,566.79

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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.