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Finding the Fourth Proportional to 117.97, 176.86 and 40.91

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Solution

The fourth proportional to 117.97, 176.86 and 40.91 is: 61.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.97 : 176.86 = 40.91 : x
  2. Step 2: Convert to fraction form
    117.97/176.86 = 40.91/x
  3. Step 3: Cross multiply
    117.97x = 176.86 × 40.91
  4. Step 4: Simplify right side
    117.97x = 7,235.77
  5. Step 5: Solve for x
    x = 7,235.77/117.97
  6. Step 6: Final answer
    x = 61.34

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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.