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Finding the Fourth Proportional to 108.89, 150.18 and 79.39

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Solution

The fourth proportional to 108.89, 150.18 and 79.39 is: 109.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.89 : 150.18 = 79.39 : x
  2. Step 2: Convert to fraction form
    108.89/150.18 = 79.39/x
  3. Step 3: Cross multiply
    108.89x = 150.18 × 79.39
  4. Step 4: Simplify right side
    108.89x = 11,922.41
  5. Step 5: Solve for x
    x = 11,922.41/108.89
  6. Step 6: Final answer
    x = 109.49

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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.