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Finding the Fourth Proportional to 106.36, 159.28 and 72.02

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Solution

The fourth proportional to 106.36, 159.28 and 72.02 is: 107.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.36 : 159.28 = 72.02 : x
  2. Step 2: Convert to fraction form
    106.36/159.28 = 72.02/x
  3. Step 3: Cross multiply
    106.36x = 159.28 × 72.02
  4. Step 4: Simplify right side
    106.36x = 11,471.17
  5. Step 5: Solve for x
    x = 11,471.17/106.36
  6. Step 6: Final answer
    x = 107.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.