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Finding the Fourth Proportional to 109.40, 164.04 and 55.34

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Solution

The fourth proportional to 109.40, 164.04 and 55.34 is: 82.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.40 : 164.04 = 55.34 : x
  2. Step 2: Convert to fraction form
    109.40/164.04 = 55.34/x
  3. Step 3: Cross multiply
    109.40x = 164.04 × 55.34
  4. Step 4: Simplify right side
    109.40x = 9,077.97
  5. Step 5: Solve for x
    x = 9,077.97/109.40
  6. Step 6: Final answer
    x = 82.98

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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.