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Finding the Fourth Proportional to 66,608.86, 91,917.54 and 36,393.42

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Solution

The fourth proportional to 66,608.86, 91,917.54 and 36,393.42 is: 50,221.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.86 : 91,917.54 = 36,393.42 : x
  2. Step 2: Convert to fraction form
    66,608.86/91,917.54 = 36,393.42/x
  3. Step 3: Cross multiply
    66,608.86x = 91,917.54 × 36,393.42
  4. Step 4: Simplify right side
    66,608.86x = 3,345,193,638.59
  5. Step 5: Solve for x
    x = 3,345,193,638.59/66,608.86
  6. Step 6: Final answer
    x = 50,221.45

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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.