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Finding the Fourth Proportional to 109.76, 164.36 and 88.04

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Solution

The fourth proportional to 109.76, 164.36 and 88.04 is: 131.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.76 : 164.36 = 88.04 : x
  2. Step 2: Convert to fraction form
    109.76/164.36 = 88.04/x
  3. Step 3: Cross multiply
    109.76x = 164.36 × 88.04
  4. Step 4: Simplify right side
    109.76x = 14,470.25
  5. Step 5: Solve for x
    x = 14,470.25/109.76
  6. Step 6: Final answer
    x = 131.84

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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.