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Finding the Fourth Proportional to 135.70, 203.04 and 90.16

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Solution

The fourth proportional to 135.70, 203.04 and 90.16 is: 134.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.70 : 203.04 = 90.16 : x
  2. Step 2: Convert to fraction form
    135.70/203.04 = 90.16/x
  3. Step 3: Cross multiply
    135.70x = 203.04 × 90.16
  4. Step 4: Simplify right side
    135.70x = 18,306.09
  5. Step 5: Solve for x
    x = 18,306.09/135.70
  6. Step 6: Final answer
    x = 134.90

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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.