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Finding the Fourth Proportional to 105.96, 159.29 and 98.84

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Solution

The fourth proportional to 105.96, 159.29 and 98.84 is: 148.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.96 : 159.29 = 98.84 : x
  2. Step 2: Convert to fraction form
    105.96/159.29 = 98.84/x
  3. Step 3: Cross multiply
    105.96x = 159.29 × 98.84
  4. Step 4: Simplify right side
    105.96x = 15,742.93
  5. Step 5: Solve for x
    x = 15,742.93/105.96
  6. Step 6: Final answer
    x = 148.57

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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.