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Finding the Fourth Proportional to 77,745.72, 107,284.65 and 43,755.62

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Solution

The fourth proportional to 77,745.72, 107,284.65 and 43,755.62 is: 60,380.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,745.72 : 107,284.65 = 43,755.62 : x
  2. Step 2: Convert to fraction form
    77,745.72/107,284.65 = 43,755.62/x
  3. Step 3: Cross multiply
    77,745.72x = 107,284.65 × 43,755.62
  4. Step 4: Simplify right side
    77,745.72x = 4,694,306,377.23
  5. Step 5: Solve for x
    x = 4,694,306,377.23/77,745.72
  6. Step 6: Final answer
    x = 60,380.25

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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.