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Finding the Fourth Proportional to 134.19, 201.23 and 42.87

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Solution

The fourth proportional to 134.19, 201.23 and 42.87 is: 64.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.19 : 201.23 = 42.87 : x
  2. Step 2: Convert to fraction form
    134.19/201.23 = 42.87/x
  3. Step 3: Cross multiply
    134.19x = 201.23 × 42.87
  4. Step 4: Simplify right side
    134.19x = 8,625.97
  5. Step 5: Solve for x
    x = 8,625.97/134.19
  6. Step 6: Final answer
    x = 64.28

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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.