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Finding the Fourth Proportional to 79.06, 117.98 and 76.72

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Solution

The fourth proportional to 79.06, 117.98 and 76.72 is: 114.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.06 : 117.98 = 76.72 : x
  2. Step 2: Convert to fraction form
    79.06/117.98 = 76.72/x
  3. Step 3: Cross multiply
    79.06x = 117.98 × 76.72
  4. Step 4: Simplify right side
    79.06x = 9,051.43
  5. Step 5: Solve for x
    x = 9,051.43/79.06
  6. Step 6: Final answer
    x = 114.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.