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Finding the Fourth Proportional to 109.52, 150.98 and 68.05

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Solution

The fourth proportional to 109.52, 150.98 and 68.05 is: 93.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.52 : 150.98 = 68.05 : x
  2. Step 2: Convert to fraction form
    109.52/150.98 = 68.05/x
  3. Step 3: Cross multiply
    109.52x = 150.98 × 68.05
  4. Step 4: Simplify right side
    109.52x = 10,274.29
  5. Step 5: Solve for x
    x = 10,274.29/109.52
  6. Step 6: Final answer
    x = 93.81

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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.