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Finding the Fourth Proportional to 68.01, 101.80 and 42.36

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Solution

The fourth proportional to 68.01, 101.80 and 42.36 is: 63.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.01 : 101.80 = 42.36 : x
  2. Step 2: Convert to fraction form
    68.01/101.80 = 42.36/x
  3. Step 3: Cross multiply
    68.01x = 101.80 × 42.36
  4. Step 4: Simplify right side
    68.01x = 4,311.68
  5. Step 5: Solve for x
    x = 4,311.68/68.01
  6. Step 6: Final answer
    x = 63.40

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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.