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Finding the Fourth Proportional to 133.74, 184.77 and 121.59

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Solution

The fourth proportional to 133.74, 184.77 and 121.59 is: 167.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.74 : 184.77 = 121.59 : x
  2. Step 2: Convert to fraction form
    133.74/184.77 = 121.59/x
  3. Step 3: Cross multiply
    133.74x = 184.77 × 121.59
  4. Step 4: Simplify right side
    133.74x = 22,466.18
  5. Step 5: Solve for x
    x = 22,466.18/133.74
  6. Step 6: Final answer
    x = 167.98

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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.