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Finding the Fourth Proportional to 109.95, 163.80 and 106.08

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Solution

The fourth proportional to 109.95, 163.80 and 106.08 is: 158.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.95 : 163.80 = 106.08 : x
  2. Step 2: Convert to fraction form
    109.95/163.80 = 106.08/x
  3. Step 3: Cross multiply
    109.95x = 163.80 × 106.08
  4. Step 4: Simplify right side
    109.95x = 17,375.90
  5. Step 5: Solve for x
    x = 17,375.90/109.95
  6. Step 6: Final answer
    x = 158.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.