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Finding the Fourth Proportional to 107.96, 148.80 and 83.35

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Solution

The fourth proportional to 107.96, 148.80 and 83.35 is: 114.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.96 : 148.80 = 83.35 : x
  2. Step 2: Convert to fraction form
    107.96/148.80 = 83.35/x
  3. Step 3: Cross multiply
    107.96x = 148.80 × 83.35
  4. Step 4: Simplify right side
    107.96x = 12,402.48
  5. Step 5: Solve for x
    x = 12,402.48/107.96
  6. Step 6: Final answer
    x = 114.88

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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.