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Finding the Fourth Proportional to 90.24, 134.49 and 88.62

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Solution

The fourth proportional to 90.24, 134.49 and 88.62 is: 132.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.24 : 134.49 = 88.62 : x
  2. Step 2: Convert to fraction form
    90.24/134.49 = 88.62/x
  3. Step 3: Cross multiply
    90.24x = 134.49 × 88.62
  4. Step 4: Simplify right side
    90.24x = 11,918.50
  5. Step 5: Solve for x
    x = 11,918.50/90.24
  6. Step 6: Final answer
    x = 132.08

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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.