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Finding the Fourth Proportional to 77,755.60, 107,287.68 and 43,759.56

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Solution

The fourth proportional to 77,755.60, 107,287.68 and 43,759.56 is: 60,379.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,755.60 : 107,287.68 = 43,759.56 : x
  2. Step 2: Convert to fraction form
    77,755.60/107,287.68 = 43,759.56/x
  3. Step 3: Cross multiply
    77,755.60x = 107,287.68 × 43,759.56
  4. Step 4: Simplify right side
    77,755.60x = 4,694,861,670.22
  5. Step 5: Solve for x
    x = 4,694,861,670.22/77,755.60
  6. Step 6: Final answer
    x = 60,379.72

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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.