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Finding the Fourth Proportional to 77,781.74, 107,310.73 and 50,939.56

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Solution

The fourth proportional to 77,781.74, 107,310.73 and 50,939.56 is: 70,278.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,781.74 : 107,310.73 = 50,939.56 : x
  2. Step 2: Convert to fraction form
    77,781.74/107,310.73 = 50,939.56/x
  3. Step 3: Cross multiply
    77,781.74x = 107,310.73 × 50,939.56
  4. Step 4: Simplify right side
    77,781.74x = 5,466,361,369.48
  5. Step 5: Solve for x
    x = 5,466,361,369.48/77,781.74
  6. Step 6: Final answer
    x = 70,278.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.