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Finding the Fourth Proportional to 107.73, 148.53 and 78.57

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Solution

The fourth proportional to 107.73, 148.53 and 78.57 is: 108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.73 : 148.53 = 78.57 : x
  2. Step 2: Convert to fraction form
    107.73/148.53 = 78.57/x
  3. Step 3: Cross multiply
    107.73x = 148.53 × 78.57
  4. Step 4: Simplify right side
    107.73x = 11,670.30
  5. Step 5: Solve for x
    x = 11,670.30/107.73
  6. Step 6: Final answer
    x = 108.33

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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.