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Finding the Fourth Proportional to 66,440.60, 91,690.08 and 36,226.88

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Solution

The fourth proportional to 66,440.60, 91,690.08 and 36,226.88 is: 49,994.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440.60 : 91,690.08 = 36,226.88 : x
  2. Step 2: Convert to fraction form
    66,440.60/91,690.08 = 36,226.88/x
  3. Step 3: Cross multiply
    66,440.60x = 91,690.08 × 36,226.88
  4. Step 4: Simplify right side
    66,440.60x = 3,321,645,525.35
  5. Step 5: Solve for x
    x = 3,321,645,525.35/66,440.60
  6. Step 6: Final answer
    x = 49,994.21

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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.