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Finding the Fourth Proportional to 189.96, 285.12 and 93.84

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Solution

The fourth proportional to 189.96, 285.12 and 93.84 is: 140.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.96 : 285.12 = 93.84 : x
  2. Step 2: Convert to fraction form
    189.96/285.12 = 93.84/x
  3. Step 3: Cross multiply
    189.96x = 285.12 × 93.84
  4. Step 4: Simplify right side
    189.96x = 26,755.66
  5. Step 5: Solve for x
    x = 26,755.66/189.96
  6. Step 6: Final answer
    x = 140.85

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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.