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Finding the Fourth Proportional to 77,014.93, 115,361.39 and 61,940.56

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Solution

The fourth proportional to 77,014.93, 115,361.39 and 61,940.56 is: 92,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,014.93 : 115,361.39 = 61,940.56 : x
  2. Step 2: Convert to fraction form
    77,014.93/115,361.39 = 61,940.56/x
  3. Step 3: Cross multiply
    77,014.93x = 115,361.39 × 61,940.56
  4. Step 4: Simplify right side
    77,014.93x = 7,145,548,965.43
  5. Step 5: Solve for x
    x = 7,145,548,965.43/77,014.93
  6. Step 6: Final answer
    x = 92,781.35

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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.