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Finding the Fourth Proportional to 167,811.20, 251,716.80 and 137,091.20

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Solution

The fourth proportional to 167,811.20, 251,716.80 and 137,091.20 is: 205,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,811.20 : 251,716.80 = 137,091.20 : x
  2. Step 2: Convert to fraction form
    167,811.20/251,716.80 = 137,091.20/x
  3. Step 3: Cross multiply
    167,811.20x = 251,716.80 × 137,091.20
  4. Step 4: Simplify right side
    167,811.20x = 34,508,158,172.16
  5. Step 5: Solve for x
    x = 34,508,158,172.16/167,811.20
  6. Step 6: Final answer
    x = 205,636.80

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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.