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Finding the Fourth Proportional to 66,618.53, 91,929.66 and 36,397.84

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Solution

The fourth proportional to 66,618.53, 91,929.66 and 36,397.84 is: 50,226.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.53 : 91,929.66 = 36,397.84 : x
  2. Step 2: Convert to fraction form
    66,618.53/91,929.66 = 36,397.84/x
  3. Step 3: Cross multiply
    66,618.53x = 91,929.66 × 36,397.84
  4. Step 4: Simplify right side
    66,618.53x = 3,346,040,861.99
  5. Step 5: Solve for x
    x = 3,346,040,861.99/66,618.53
  6. Step 6: Final answer
    x = 50,226.88

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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.