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Finding the Fourth Proportional to 81,067.50, 121,601.79 and 25,663.50

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Solution

The fourth proportional to 81,067.50, 121,601.79 and 25,663.50 is: 38,495.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,067.50 : 121,601.79 = 25,663.50 : x
  2. Step 2: Convert to fraction form
    81,067.50/121,601.79 = 25,663.50/x
  3. Step 3: Cross multiply
    81,067.50x = 121,601.79 × 25,663.50
  4. Step 4: Simplify right side
    81,067.50x = 3,120,727,537.67
  5. Step 5: Solve for x
    x = 3,120,727,537.67/81,067.50
  6. Step 6: Final answer
    x = 38,495.42

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1.5x scale

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.