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Finding the Fourth Proportional to 110.04, 151.76 and 99.78

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Solution

The fourth proportional to 110.04, 151.76 and 99.78 is: 137.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.04 : 151.76 = 99.78 : x
  2. Step 2: Convert to fraction form
    110.04/151.76 = 99.78/x
  3. Step 3: Cross multiply
    110.04x = 151.76 × 99.78
  4. Step 4: Simplify right side
    110.04x = 15,142.11
  5. Step 5: Solve for x
    x = 15,142.11/110.04
  6. Step 6: Final answer
    x = 137.61

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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.