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Finding the Fourth Proportional to 66,118.50, 91,243.53 and 36,310.50

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Solution

The fourth proportional to 66,118.50, 91,243.53 and 36,310.50 is: 50,108.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,118.50 : 91,243.53 = 36,310.50 : x
  2. Step 2: Convert to fraction form
    66,118.50/91,243.53 = 36,310.50/x
  3. Step 3: Cross multiply
    66,118.50x = 91,243.53 × 36,310.50
  4. Step 4: Simplify right side
    66,118.50x = 3,313,098,196.07
  5. Step 5: Solve for x
    x = 3,313,098,196.07/66,118.50
  6. Step 6: Final answer
    x = 50,108.49

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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.