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Finding the Fourth Proportional to 109.25, 163.70 and 92.93

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Solution

The fourth proportional to 109.25, 163.70 and 92.93 is: 139.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.25 : 163.70 = 92.93 : x
  2. Step 2: Convert to fraction form
    109.25/163.70 = 92.93/x
  3. Step 3: Cross multiply
    109.25x = 163.70 × 92.93
  4. Step 4: Simplify right side
    109.25x = 15,213.40
  5. Step 5: Solve for x
    x = 15,213.40/109.25
  6. Step 6: Final answer
    x = 139.25

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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.