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Finding the Fourth Proportional to 212.70, 319.18 and 110.06

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Solution

The fourth proportional to 212.70, 319.18 and 110.06 is: 165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.70 : 319.18 = 110.06 : x
  2. Step 2: Convert to fraction form
    212.70/319.18 = 110.06/x
  3. Step 3: Cross multiply
    212.70x = 319.18 × 110.06
  4. Step 4: Simplify right side
    212.70x = 35,128.95
  5. Step 5: Solve for x
    x = 35,128.95/212.70
  6. Step 6: Final answer
    x = 165.16

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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.