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Finding the Fourth Proportional to 79.99, 110.42 and 52.45

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Solution

The fourth proportional to 79.99, 110.42 and 52.45 is: 72.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.99 : 110.42 = 52.45 : x
  2. Step 2: Convert to fraction form
    79.99/110.42 = 52.45/x
  3. Step 3: Cross multiply
    79.99x = 110.42 × 52.45
  4. Step 4: Simplify right side
    79.99x = 5,791.53
  5. Step 5: Solve for x
    x = 5,791.53/79.99
  6. Step 6: Final answer
    x = 72.40

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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.