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Finding the Fourth Proportional to 125.63, 173.27 and 90.79

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Solution

The fourth proportional to 125.63, 173.27 and 90.79 is: 125.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.63 : 173.27 = 90.79 : x
  2. Step 2: Convert to fraction form
    125.63/173.27 = 90.79/x
  3. Step 3: Cross multiply
    125.63x = 173.27 × 90.79
  4. Step 4: Simplify right side
    125.63x = 15,731.18
  5. Step 5: Solve for x
    x = 15,731.18/125.63
  6. Step 6: Final answer
    x = 125.22

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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.