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Finding the Fourth Proportional to 117.22, 162.46 and 115.06

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Solution

The fourth proportional to 117.22, 162.46 and 115.06 is: 159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.22 : 162.46 = 115.06 : x
  2. Step 2: Convert to fraction form
    117.22/162.46 = 115.06/x
  3. Step 3: Cross multiply
    117.22x = 162.46 × 115.06
  4. Step 4: Simplify right side
    117.22x = 18,692.65
  5. Step 5: Solve for x
    x = 18,692.65/117.22
  6. Step 6: Final answer
    x = 159.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.