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Finding the Fourth Proportional to 66,187, 91,339.50 and 36,379

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Solution

The fourth proportional to 66,187, 91,339.50 and 36,379 is: 50,203.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,187 : 91,339.50 = 36,379 : x
  2. Step 2: Convert to fraction form
    66,187/91,339.50 = 36,379/x
  3. Step 3: Cross multiply
    66,187x = 91,339.50 × 36,379
  4. Step 4: Simplify right side
    66,187x = 3,322,839,670.50
  5. Step 5: Solve for x
    x = 3,322,839,670.50/66,187
  6. Step 6: Final answer
    x = 50,203.81

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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.