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Finding the Fourth Proportional to 73.66, 109.89 and 70.22

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Solution

The fourth proportional to 73.66, 109.89 and 70.22 is: 104.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.66 : 109.89 = 70.22 : x
  2. Step 2: Convert to fraction form
    73.66/109.89 = 70.22/x
  3. Step 3: Cross multiply
    73.66x = 109.89 × 70.22
  4. Step 4: Simplify right side
    73.66x = 7,716.48
  5. Step 5: Solve for x
    x = 7,716.48/73.66
  6. Step 6: Final answer
    x = 104.76

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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.