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Finding the Fourth Proportional to 77,671.38, 107,185.49 and 43,679.86

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Solution

The fourth proportional to 77,671.38, 107,185.49 and 43,679.86 is: 60,277.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,671.38 : 107,185.49 = 43,679.86 : x
  2. Step 2: Convert to fraction form
    77,671.38/107,185.49 = 43,679.86/x
  3. Step 3: Cross multiply
    77,671.38x = 107,185.49 × 43,679.86
  4. Step 4: Simplify right side
    77,671.38x = 4,681,847,276.61
  5. Step 5: Solve for x
    x = 4,681,847,276.61/77,671.38
  6. Step 6: Final answer
    x = 60,277.63

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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.