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Finding the Fourth Proportional to 109.70, 164.23 and 100.07

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Solution

The fourth proportional to 109.70, 164.23 and 100.07 is: 149.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.70 : 164.23 = 100.07 : x
  2. Step 2: Convert to fraction form
    109.70/164.23 = 100.07/x
  3. Step 3: Cross multiply
    109.70x = 164.23 × 100.07
  4. Step 4: Simplify right side
    109.70x = 16,433.42
  5. Step 5: Solve for x
    x = 16,433.42/109.70
  6. Step 6: Final answer
    x = 149.81

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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.