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Finding the Fourth Proportional to 106.56, 146.97 and 65.09

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Solution

The fourth proportional to 106.56, 146.97 and 65.09 is: 89.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.56 : 146.97 = 65.09 : x
  2. Step 2: Convert to fraction form
    106.56/146.97 = 65.09/x
  3. Step 3: Cross multiply
    106.56x = 146.97 × 65.09
  4. Step 4: Simplify right side
    106.56x = 9,566.28
  5. Step 5: Solve for x
    x = 9,566.28/106.56
  6. Step 6: Final answer
    x = 89.77

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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.