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Finding the Fourth Proportional to 66,618.87, 91,934.30 and 36,404.21

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Solution

The fourth proportional to 66,618.87, 91,934.30 and 36,404.21 is: 50,237.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.87 : 91,934.30 = 36,404.21 : x
  2. Step 2: Convert to fraction form
    66,618.87/91,934.30 = 36,404.21/x
  3. Step 3: Cross multiply
    66,618.87x = 91,934.30 × 36,404.21
  4. Step 4: Simplify right side
    66,618.87x = 3,346,794,921.71
  5. Step 5: Solve for x
    x = 3,346,794,921.71/66,618.87
  6. Step 6: Final answer
    x = 50,237.94

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1.5x scale

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.