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Finding the Fourth Proportional to 66,287.21, 91,475.39 and 36,479.21

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Solution

The fourth proportional to 66,287.21, 91,475.39 and 36,479.21 is: 50,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.21 : 91,475.39 = 36,479.21 : x
  2. Step 2: Convert to fraction form
    66,287.21/91,475.39 = 36,479.21/x
  3. Step 3: Cross multiply
    66,287.21x = 91,475.39 × 36,479.21
  4. Step 4: Simplify right side
    66,287.21x = 3,336,949,595.46
  5. Step 5: Solve for x
    x = 3,336,949,595.46/66,287.21
  6. Step 6: Final answer
    x = 50,340.78

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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.