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Finding the Fourth Proportional to 125.50, 189.21 and 124.72

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Solution

The fourth proportional to 125.50, 189.21 and 124.72 is: 188.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.50 : 189.21 = 124.72 : x
  2. Step 2: Convert to fraction form
    125.50/189.21 = 124.72/x
  3. Step 3: Cross multiply
    125.50x = 189.21 × 124.72
  4. Step 4: Simplify right side
    125.50x = 23,597.33
  5. Step 5: Solve for x
    x = 23,597.33/125.50
  6. Step 6: Final answer
    x = 188.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.