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Finding the Fourth Proportional to 66,219, 91,382.22 and 36,411

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Solution

The fourth proportional to 66,219, 91,382.22 and 36,411 is: 50,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,219 : 91,382.22 = 36,411 : x
  2. Step 2: Convert to fraction form
    66,219/91,382.22 = 36,411/x
  3. Step 3: Cross multiply
    66,219x = 91,382.22 × 36,411
  4. Step 4: Simplify right side
    66,219x = 3,327,318,012.42
  5. Step 5: Solve for x
    x = 3,327,318,012.42/66,219
  6. Step 6: Final answer
    x = 50,247.18

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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.