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Finding the Fourth Proportional to 109.66, 164.68 and 94.66

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Solution

The fourth proportional to 109.66, 164.68 and 94.66 is: 142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.66 : 164.68 = 94.66 : x
  2. Step 2: Convert to fraction form
    109.66/164.68 = 94.66/x
  3. Step 3: Cross multiply
    109.66x = 164.68 × 94.66
  4. Step 4: Simplify right side
    109.66x = 15,588.61
  5. Step 5: Solve for x
    x = 15,588.61/109.66
  6. Step 6: Final answer
    x = 142.15

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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.