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Finding the Fourth Proportional to 173.86, 240 and 118.78

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Solution

The fourth proportional to 173.86, 240 and 118.78 is: 163.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.86 : 240 = 118.78 : x
  2. Step 2: Convert to fraction form
    173.86/240 = 118.78/x
  3. Step 3: Cross multiply
    173.86x = 240 × 118.78
  4. Step 4: Simplify right side
    173.86x = 28,507.20
  5. Step 5: Solve for x
    x = 28,507.20/173.86
  6. Step 6: Final answer
    x = 163.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.