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Finding the Fourth Proportional to 117.86, 176.31 and 97.61

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Solution

The fourth proportional to 117.86, 176.31 and 97.61 is: 146.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.86 : 176.31 = 97.61 : x
  2. Step 2: Convert to fraction form
    117.86/176.31 = 97.61/x
  3. Step 3: Cross multiply
    117.86x = 176.31 × 97.61
  4. Step 4: Simplify right side
    117.86x = 17,208.74
  5. Step 5: Solve for x
    x = 17,208.74/117.86
  6. Step 6: Final answer
    x = 146.02

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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.