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Finding the Fourth Proportional to 110.92, 153 and 72.16

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Solution

The fourth proportional to 110.92, 153 and 72.16 is: 99.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.92 : 153 = 72.16 : x
  2. Step 2: Convert to fraction form
    110.92/153 = 72.16/x
  3. Step 3: Cross multiply
    110.92x = 153 × 72.16
  4. Step 4: Simplify right side
    110.92x = 11,040.48
  5. Step 5: Solve for x
    x = 11,040.48/110.92
  6. Step 6: Final answer
    x = 99.54

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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.