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Finding the Fourth Proportional to 125.82, 188.79 and 82.47

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Solution

The fourth proportional to 125.82, 188.79 and 82.47 is: 123.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.82 : 188.79 = 82.47 : x
  2. Step 2: Convert to fraction form
    125.82/188.79 = 82.47/x
  3. Step 3: Cross multiply
    125.82x = 188.79 × 82.47
  4. Step 4: Simplify right side
    125.82x = 15,569.51
  5. Step 5: Solve for x
    x = 15,569.51/125.82
  6. Step 6: Final answer
    x = 123.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.