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Finding the Fourth Proportional to 110.94, 153.30 and 79.95

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Solution

The fourth proportional to 110.94, 153.30 and 79.95 is: 110.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.94 : 153.30 = 79.95 : x
  2. Step 2: Convert to fraction form
    110.94/153.30 = 79.95/x
  3. Step 3: Cross multiply
    110.94x = 153.30 × 79.95
  4. Step 4: Simplify right side
    110.94x = 12,257.21
  5. Step 5: Solve for x
    x = 12,257.21/110.94
  6. Step 6: Final answer
    x = 110.49

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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.