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Finding the Fourth Proportional to 125.94, 189.64 and 104.47

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Solution

The fourth proportional to 125.94, 189.64 and 104.47 is: 157.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.94 : 189.64 = 104.47 : x
  2. Step 2: Convert to fraction form
    125.94/189.64 = 104.47/x
  3. Step 3: Cross multiply
    125.94x = 189.64 × 104.47
  4. Step 4: Simplify right side
    125.94x = 19,811.69
  5. Step 5: Solve for x
    x = 19,811.69/125.94
  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.