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Finding the Fourth Proportional to 45,361.88, 68,048.78 and 15,781.96

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Solution

The fourth proportional to 45,361.88, 68,048.78 and 15,781.96 is: 23,675.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,361.88 : 68,048.78 = 15,781.96 : x
  2. Step 2: Convert to fraction form
    45,361.88/68,048.78 = 15,781.96/x
  3. Step 3: Cross multiply
    45,361.88x = 68,048.78 × 15,781.96
  4. Step 4: Simplify right side
    45,361.88x = 1,073,943,124.01
  5. Step 5: Solve for x
    x = 1,073,943,124.01/45,361.88
  6. Step 6: Final answer
    x = 23,675.01

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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.