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Finding the Fourth Proportional to 147.68, 222.68 and 135.68

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Solution

The fourth proportional to 147.68, 222.68 and 135.68 is: 204.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.68 : 222.68 = 135.68 : x
  2. Step 2: Convert to fraction form
    147.68/222.68 = 135.68/x
  3. Step 3: Cross multiply
    147.68x = 222.68 × 135.68
  4. Step 4: Simplify right side
    147.68x = 30,213.22
  5. Step 5: Solve for x
    x = 30,213.22/147.68
  6. Step 6: Final answer
    x = 204.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.