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Finding the Fourth Proportional to 84,036, 126,074.48 and 25,668

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Solution

The fourth proportional to 84,036, 126,074.48 and 25,668 is: 38,508.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,036 : 126,074.48 = 25,668 : x
  2. Step 2: Convert to fraction form
    84,036/126,074.48 = 25,668/x
  3. Step 3: Cross multiply
    84,036x = 126,074.48 × 25,668
  4. Step 4: Simplify right side
    84,036x = 3,236,079,752.64
  5. Step 5: Solve for x
    x = 3,236,079,752.64/84,036
  6. Step 6: Final answer
    x = 38,508.26

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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.