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Finding the Fourth Proportional to 107.43, 148.29 and 68.64

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Solution

The fourth proportional to 107.43, 148.29 and 68.64 is: 94.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.43 : 148.29 = 68.64 : x
  2. Step 2: Convert to fraction form
    107.43/148.29 = 68.64/x
  3. Step 3: Cross multiply
    107.43x = 148.29 × 68.64
  4. Step 4: Simplify right side
    107.43x = 10,178.63
  5. Step 5: Solve for x
    x = 10,178.63/107.43
  6. Step 6: Final answer
    x = 94.75

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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.