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Finding the Fourth Proportional to 134.21, 185.27 and 90.57

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Solution

The fourth proportional to 134.21, 185.27 and 90.57 is: 125.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.21 : 185.27 = 90.57 : x
  2. Step 2: Convert to fraction form
    134.21/185.27 = 90.57/x
  3. Step 3: Cross multiply
    134.21x = 185.27 × 90.57
  4. Step 4: Simplify right side
    134.21x = 16,779.90
  5. Step 5: Solve for x
    x = 16,779.90/134.21
  6. Step 6: Final answer
    x = 125.03

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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.