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Finding the Fourth Proportional to 108.56, 149.69 and 93.06

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Solution

The fourth proportional to 108.56, 149.69 and 93.06 is: 128.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.56 : 149.69 = 93.06 : x
  2. Step 2: Convert to fraction form
    108.56/149.69 = 93.06/x
  3. Step 3: Cross multiply
    108.56x = 149.69 × 93.06
  4. Step 4: Simplify right side
    108.56x = 13,930.95
  5. Step 5: Solve for x
    x = 13,930.95/108.56
  6. Step 6: Final answer
    x = 128.33

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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.