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Finding the Fourth Proportional to 107.66, 147.69 and 98.55

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Solution

The fourth proportional to 107.66, 147.69 and 98.55 is: 135.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.66 : 147.69 = 98.55 : x
  2. Step 2: Convert to fraction form
    107.66/147.69 = 98.55/x
  3. Step 3: Cross multiply
    107.66x = 147.69 × 98.55
  4. Step 4: Simplify right side
    107.66x = 14,554.85
  5. Step 5: Solve for x
    x = 14,554.85/107.66
  6. Step 6: Final answer
    x = 135.19

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.