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Finding the Fourth Proportional to 107.49, 148.31 and 60.86

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Solution

The fourth proportional to 107.49, 148.31 and 60.86 is: 83.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.49 : 148.31 = 60.86 : x
  2. Step 2: Convert to fraction form
    107.49/148.31 = 60.86/x
  3. Step 3: Cross multiply
    107.49x = 148.31 × 60.86
  4. Step 4: Simplify right side
    107.49x = 9,026.15
  5. Step 5: Solve for x
    x = 9,026.15/107.49
  6. Step 6: Final answer
    x = 83.97

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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.