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Finding the Fourth Proportional to 66,000, 91,080 and 36,192

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Solution

The fourth proportional to 66,000, 91,080 and 36,192 is: 49,944.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,000 : 91,080 = 36,192 : x
  2. Step 2: Convert to fraction form
    66,000/91,080 = 36,192/x
  3. Step 3: Cross multiply
    66,000x = 91,080 × 36,192
  4. Step 4: Simplify right side
    66,000x = 3,296,367,360
  5. Step 5: Solve for x
    x = 3,296,367,360/66,000
  6. Step 6: Final answer
    x = 49,944.96

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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.