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Finding the Fourth Proportional to 173.10, 238.90 and 117.86

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Solution

The fourth proportional to 173.10, 238.90 and 117.86 is: 162.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.10 : 238.90 = 117.86 : x
  2. Step 2: Convert to fraction form
    173.10/238.90 = 117.86/x
  3. Step 3: Cross multiply
    173.10x = 238.90 × 117.86
  4. Step 4: Simplify right side
    173.10x = 28,156.75
  5. Step 5: Solve for x
    x = 28,156.75/173.10
  6. Step 6: Final answer
    x = 162.66

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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.