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Finding the Fourth Proportional to 163.35, 245.12 and 65.83

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Solution

The fourth proportional to 163.35, 245.12 and 65.83 is: 98.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.35 : 245.12 = 65.83 : x
  2. Step 2: Convert to fraction form
    163.35/245.12 = 65.83/x
  3. Step 3: Cross multiply
    163.35x = 245.12 × 65.83
  4. Step 4: Simplify right side
    163.35x = 16,136.25
  5. Step 5: Solve for x
    x = 16,136.25/163.35
  6. Step 6: Final answer
    x = 98.78

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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.