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Finding the Fourth Proportional to 73.42, 110 and 42.96

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Solution

The fourth proportional to 73.42, 110 and 42.96 is: 64.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.42 : 110 = 42.96 : x
  2. Step 2: Convert to fraction form
    73.42/110 = 42.96/x
  3. Step 3: Cross multiply
    73.42x = 110 × 42.96
  4. Step 4: Simplify right side
    73.42x = 4,725.60
  5. Step 5: Solve for x
    x = 4,725.60/73.42
  6. Step 6: Final answer
    x = 64.36

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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.