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Finding the Fourth Proportional to 72,721.28, 109,081.92 and 22,805.74

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Solution

The fourth proportional to 72,721.28, 109,081.92 and 22,805.74 is: 34,208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,721.28 : 109,081.92 = 22,805.74 : x
  2. Step 2: Convert to fraction form
    72,721.28/109,081.92 = 22,805.74/x
  3. Step 3: Cross multiply
    72,721.28x = 109,081.92 × 22,805.74
  4. Step 4: Simplify right side
    72,721.28x = 2,487,693,514.51
  5. Step 5: Solve for x
    x = 2,487,693,514.51/72,721.28
  6. Step 6: Final answer
    x = 34,208.61

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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.