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Finding the Fourth Proportional to 79.01, 109.54 and 76.47

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Solution

The fourth proportional to 79.01, 109.54 and 76.47 is: 106.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.01 : 109.54 = 76.47 : x
  2. Step 2: Convert to fraction form
    79.01/109.54 = 76.47/x
  3. Step 3: Cross multiply
    79.01x = 109.54 × 76.47
  4. Step 4: Simplify right side
    79.01x = 8,376.14
  5. Step 5: Solve for x
    x = 8,376.14/79.01
  6. Step 6: Final answer
    x = 106.02

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.