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Finding the Fourth Proportional to 106.45, 146.83 and 71.47

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Solution

The fourth proportional to 106.45, 146.83 and 71.47 is: 98.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.45 : 146.83 = 71.47 : x
  2. Step 2: Convert to fraction form
    106.45/146.83 = 71.47/x
  3. Step 3: Cross multiply
    106.45x = 146.83 × 71.47
  4. Step 4: Simplify right side
    106.45x = 10,493.94
  5. Step 5: Solve for x
    x = 10,493.94/106.45
  6. Step 6: Final answer
    x = 98.58

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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.