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Finding the Fourth Proportional to 137.77, 205.66 and 117.26

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Solution

The fourth proportional to 137.77, 205.66 and 117.26 is: 175.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.77 : 205.66 = 117.26 : x
  2. Step 2: Convert to fraction form
    137.77/205.66 = 117.26/x
  3. Step 3: Cross multiply
    137.77x = 205.66 × 117.26
  4. Step 4: Simplify right side
    137.77x = 24,115.69
  5. Step 5: Solve for x
    x = 24,115.69/137.77
  6. Step 6: Final answer
    x = 175.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.