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Finding the Fourth Proportional to 162.88, 244.48 and 85.96

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Solution

The fourth proportional to 162.88, 244.48 and 85.96 is: 129.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.88 : 244.48 = 85.96 : x
  2. Step 2: Convert to fraction form
    162.88/244.48 = 85.96/x
  3. Step 3: Cross multiply
    162.88x = 244.48 × 85.96
  4. Step 4: Simplify right side
    162.88x = 21,015.50
  5. Step 5: Solve for x
    x = 21,015.50/162.88
  6. Step 6: Final answer
    x = 129.02

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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.