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Finding the Fourth Proportional to 106.54, 147.28 and 105.64

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Solution

The fourth proportional to 106.54, 147.28 and 105.64 is: 146.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.54 : 147.28 = 105.64 : x
  2. Step 2: Convert to fraction form
    106.54/147.28 = 105.64/x
  3. Step 3: Cross multiply
    106.54x = 147.28 × 105.64
  4. Step 4: Simplify right side
    106.54x = 15,558.66
  5. Step 5: Solve for x
    x = 15,558.66/106.54
  6. Step 6: Final answer
    x = 146.04

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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.