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Finding the Fourth Proportional to 107.16, 159.36 and 106.80

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Solution

The fourth proportional to 107.16, 159.36 and 106.80 is: 158.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.16 : 159.36 = 106.80 : x
  2. Step 2: Convert to fraction form
    107.16/159.36 = 106.80/x
  3. Step 3: Cross multiply
    107.16x = 159.36 × 106.80
  4. Step 4: Simplify right side
    107.16x = 17,019.65
  5. Step 5: Solve for x
    x = 17,019.65/107.16
  6. Step 6: Final answer
    x = 158.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.