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Finding the Fourth Proportional to 90.05, 134.52 and 88.34

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Solution

The fourth proportional to 90.05, 134.52 and 88.34 is: 131.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.05 : 134.52 = 88.34 : x
  2. Step 2: Convert to fraction form
    90.05/134.52 = 88.34/x
  3. Step 3: Cross multiply
    90.05x = 134.52 × 88.34
  4. Step 4: Simplify right side
    90.05x = 11,882.82
  5. Step 5: Solve for x
    x = 11,882.82/90.05
  6. Step 6: Final answer
    x = 131.97

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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.