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Finding the Fourth Proportional to 168.77, 253.22 and 72.65

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Solution

The fourth proportional to 168.77, 253.22 and 72.65 is: 109.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.77 : 253.22 = 72.65 : x
  2. Step 2: Convert to fraction form
    168.77/253.22 = 72.65/x
  3. Step 3: Cross multiply
    168.77x = 253.22 × 72.65
  4. Step 4: Simplify right side
    168.77x = 18,394.80
  5. Step 5: Solve for x
    x = 18,394.80/168.77
  6. Step 6: Final answer
    x = 109.00

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.