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Finding the Fourth Proportional to 117.88, 162.20 and 114.86

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Solution

The fourth proportional to 117.88, 162.20 and 114.86 is: 158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.88 : 162.20 = 114.86 : x
  2. Step 2: Convert to fraction form
    117.88/162.20 = 114.86/x
  3. Step 3: Cross multiply
    117.88x = 162.20 × 114.86
  4. Step 4: Simplify right side
    117.88x = 18,631.38
  5. Step 5: Solve for x
    x = 18,631.38/117.88
  6. Step 6: Final answer
    x = 158.05

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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.