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Finding the Fourth Proportional to 66,380.88, 91,575.64 and 43,713.84

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Solution

The fourth proportional to 66,380.88, 91,575.64 and 43,713.84 is: 60,305.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,380.88 : 91,575.64 = 43,713.84 : x
  2. Step 2: Convert to fraction form
    66,380.88/91,575.64 = 43,713.84/x
  3. Step 3: Cross multiply
    66,380.88x = 91,575.64 × 43,713.84
  4. Step 4: Simplify right side
    66,380.88x = 4,003,122,874.86
  5. Step 5: Solve for x
    x = 4,003,122,874.86/66,380.88
  6. Step 6: Final answer
    x = 60,305.36

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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.