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Finding the Fourth Proportional to 125.60, 189.26 and 104.40

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Solution

The fourth proportional to 125.60, 189.26 and 104.40 is: 157.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.60 : 189.26 = 104.40 : x
  2. Step 2: Convert to fraction form
    125.60/189.26 = 104.40/x
  3. Step 3: Cross multiply
    125.60x = 189.26 × 104.40
  4. Step 4: Simplify right side
    125.60x = 19,758.74
  5. Step 5: Solve for x
    x = 19,758.74/125.60
  6. Step 6: Final answer
    x = 157.31

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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.