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Finding the Fourth Proportional to 189.61, 284.29 and 73.96

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Solution

The fourth proportional to 189.61, 284.29 and 73.96 is: 110.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.61 : 284.29 = 73.96 : x
  2. Step 2: Convert to fraction form
    189.61/284.29 = 73.96/x
  3. Step 3: Cross multiply
    189.61x = 284.29 × 73.96
  4. Step 4: Simplify right side
    189.61x = 21,025.72
  5. Step 5: Solve for x
    x = 21,025.72/189.61
  6. Step 6: Final answer
    x = 110.89

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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.