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Finding the Fourth Proportional to 133.34, 199.65 and 90.07

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Solution

The fourth proportional to 133.34, 199.65 and 90.07 is: 134.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.34 : 199.65 = 90.07 : x
  2. Step 2: Convert to fraction form
    133.34/199.65 = 90.07/x
  3. Step 3: Cross multiply
    133.34x = 199.65 × 90.07
  4. Step 4: Simplify right side
    133.34x = 17,982.48
  5. Step 5: Solve for x
    x = 17,982.48/133.34
  6. Step 6: Final answer
    x = 134.86

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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.