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Finding the Fourth Proportional to 81,323.99, 121,992.14 and 25,169.78

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Solution

The fourth proportional to 81,323.99, 121,992.14 and 25,169.78 is: 37,756.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.99 : 121,992.14 = 25,169.78 : x
  2. Step 2: Convert to fraction form
    81,323.99/121,992.14 = 25,169.78/x
  3. Step 3: Cross multiply
    81,323.99x = 121,992.14 × 25,169.78
  4. Step 4: Simplify right side
    81,323.99x = 3,070,514,888.77
  5. Step 5: Solve for x
    x = 3,070,514,888.77/81,323.99
  6. Step 6: Final answer
    x = 37,756.57

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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.