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Finding the Fourth Proportional to 66,608.22, 91,917.69 and 36,393.71

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Solution

The fourth proportional to 66,608.22, 91,917.69 and 36,393.71 is: 50,222.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,608.22 : 91,917.69 = 36,393.71 : x
  2. Step 2: Convert to fraction form
    66,608.22/91,917.69 = 36,393.71/x
  3. Step 3: Cross multiply
    66,608.22x = 91,917.69 × 36,393.71
  4. Step 4: Simplify right side
    66,608.22x = 3,345,225,157.67
  5. Step 5: Solve for x
    x = 3,345,225,157.67/66,608.22
  6. Step 6: Final answer
    x = 50,222.40

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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.