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Finding the Fourth Proportional to 79.74, 110.02 and 55.14

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Solution

The fourth proportional to 79.74, 110.02 and 55.14 is: 76.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.74 : 110.02 = 55.14 : x
  2. Step 2: Convert to fraction form
    79.74/110.02 = 55.14/x
  3. Step 3: Cross multiply
    79.74x = 110.02 × 55.14
  4. Step 4: Simplify right side
    79.74x = 6,066.50
  5. Step 5: Solve for x
    x = 6,066.50/79.74
  6. Step 6: Final answer
    x = 76.08

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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.