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Finding the Fourth Proportional to 106.36, 146.68 and 64.93

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Solution

The fourth proportional to 106.36, 146.68 and 64.93 is: 89.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.36 : 146.68 = 64.93 : x
  2. Step 2: Convert to fraction form
    106.36/146.68 = 64.93/x
  3. Step 3: Cross multiply
    106.36x = 146.68 × 64.93
  4. Step 4: Simplify right side
    106.36x = 9,523.61
  5. Step 5: Solve for x
    x = 9,523.61/106.36
  6. Step 6: Final answer
    x = 89.54

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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.