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Finding the Fourth Proportional to 72,908.27, 109,377.66 and 30,788.48

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Solution

The fourth proportional to 72,908.27, 109,377.66 and 30,788.48 is: 46,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,908.27 : 109,377.66 = 30,788.48 : x
  2. Step 2: Convert to fraction form
    72,908.27/109,377.66 = 30,788.48/x
  3. Step 3: Cross multiply
    72,908.27x = 109,377.66 × 30,788.48
  4. Step 4: Simplify right side
    72,908.27x = 3,367,571,350.47
  5. Step 5: Solve for x
    x = 3,367,571,350.47/72,908.27
  6. Step 6: Final answer
    x = 46,189.16

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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.