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Finding the Fourth Proportional to 168,991.92, 253,400.40 and 90,084.96

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Solution

The fourth proportional to 168,991.92, 253,400.40 and 90,084.96 is: 135,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,991.92 : 253,400.40 = 90,084.96 : x
  2. Step 2: Convert to fraction form
    168,991.92/253,400.40 = 90,084.96/x
  3. Step 3: Cross multiply
    168,991.92x = 253,400.40 × 90,084.96
  4. Step 4: Simplify right side
    168,991.92x = 22,827,564,897.98
  5. Step 5: Solve for x
    x = 22,827,564,897.98/168,991.92
  6. Step 6: Final answer
    x = 135,080.81

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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.