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Finding the Fourth Proportional to 133.24, 183.87 and 77.98

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Solution

The fourth proportional to 133.24, 183.87 and 77.98 is: 107.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.24 : 183.87 = 77.98 : x
  2. Step 2: Convert to fraction form
    133.24/183.87 = 77.98/x
  3. Step 3: Cross multiply
    133.24x = 183.87 × 77.98
  4. Step 4: Simplify right side
    133.24x = 14,337.29
  5. Step 5: Solve for x
    x = 14,337.29/133.24
  6. Step 6: Final answer
    x = 107.61

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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.