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Finding the Fourth Proportional to 107.28, 147.60 and 92.70

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Solution

The fourth proportional to 107.28, 147.60 and 92.70 is: 127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.28 : 147.60 = 92.70 : x
  2. Step 2: Convert to fraction form
    107.28/147.60 = 92.70/x
  3. Step 3: Cross multiply
    107.28x = 147.60 × 92.70
  4. Step 4: Simplify right side
    107.28x = 13,682.52
  5. Step 5: Solve for x
    x = 13,682.52/107.28
  6. Step 6: Final answer
    x = 127.54

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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.