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Finding the Fourth Proportional to 55.96, 83.92 and 45.79

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Solution

The fourth proportional to 55.96, 83.92 and 45.79 is: 68.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.96 : 83.92 = 45.79 : x
  2. Step 2: Convert to fraction form
    55.96/83.92 = 45.79/x
  3. Step 3: Cross multiply
    55.96x = 83.92 × 45.79
  4. Step 4: Simplify right side
    55.96x = 3,842.70
  5. Step 5: Solve for x
    x = 3,842.70/55.96
  6. Step 6: Final answer
    x = 68.67

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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.