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Finding the Fourth Proportional to 133.64, 184.21 and 89.90

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Solution

The fourth proportional to 133.64, 184.21 and 89.90 is: 123.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.64 : 184.21 = 89.90 : x
  2. Step 2: Convert to fraction form
    133.64/184.21 = 89.90/x
  3. Step 3: Cross multiply
    133.64x = 184.21 × 89.90
  4. Step 4: Simplify right side
    133.64x = 16,560.48
  5. Step 5: Solve for x
    x = 16,560.48/133.64
  6. Step 6: Final answer
    x = 123.92

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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.