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Finding the Fourth Proportional to 110.23, 151.90 and 79.09

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Solution

The fourth proportional to 110.23, 151.90 and 79.09 is: 108.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.23 : 151.90 = 79.09 : x
  2. Step 2: Convert to fraction form
    110.23/151.90 = 79.09/x
  3. Step 3: Cross multiply
    110.23x = 151.90 × 79.09
  4. Step 4: Simplify right side
    110.23x = 12,013.19
  5. Step 5: Solve for x
    x = 12,013.19/110.23
  6. Step 6: Final answer
    x = 108.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.