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Finding the Fourth Proportional to 137.16, 189.16 and 88.04

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Solution

The fourth proportional to 137.16, 189.16 and 88.04 is: 121.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.16 : 189.16 = 88.04 : x
  2. Step 2: Convert to fraction form
    137.16/189.16 = 88.04/x
  3. Step 3: Cross multiply
    137.16x = 189.16 × 88.04
  4. Step 4: Simplify right side
    137.16x = 16,653.90
  5. Step 5: Solve for x
    x = 16,653.90/137.16
  6. Step 6: Final answer
    x = 121.42

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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.