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Finding the Fourth Proportional to 123.84, 185.63 and 89.55

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Solution

The fourth proportional to 123.84, 185.63 and 89.55 is: 134.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.84 : 185.63 = 89.55 : x
  2. Step 2: Convert to fraction form
    123.84/185.63 = 89.55/x
  3. Step 3: Cross multiply
    123.84x = 185.63 × 89.55
  4. Step 4: Simplify right side
    123.84x = 16,622.72
  5. Step 5: Solve for x
    x = 16,622.72/123.84
  6. Step 6: Final answer
    x = 134.23

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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.