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Finding the Fourth Proportional to 66,608.89, 91,919.17 and 36,393.55

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Solution

The fourth proportional to 66,608.89, 91,919.17 and 36,393.55 is: 50,222.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.89 : 91,919.17 = 36,393.55 : x
  2. Step 2: Convert to fraction form
    66,608.89/91,919.17 = 36,393.55/x
  3. Step 3: Cross multiply
    66,608.89x = 91,919.17 × 36,393.55
  4. Step 4: Simplify right side
    66,608.89x = 3,345,264,909.35
  5. Step 5: Solve for x
    x = 3,345,264,909.35/66,608.89
  6. Step 6: Final answer
    x = 50,222.50

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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.