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Finding the Fourth Proportional to 107.87, 148.84 and 74.66

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Solution

The fourth proportional to 107.87, 148.84 and 74.66 is: 103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.87 : 148.84 = 74.66 : x
  2. Step 2: Convert to fraction form
    107.87/148.84 = 74.66/x
  3. Step 3: Cross multiply
    107.87x = 148.84 × 74.66
  4. Step 4: Simplify right side
    107.87x = 11,111.46
  5. Step 5: Solve for x
    x = 11,111.46/107.87
  6. Step 6: Final answer
    x = 103.01

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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.