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Finding the Fourth Proportional to 66,422.63, 91,660.61 and 36,207.30

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Solution

The fourth proportional to 66,422.63, 91,660.61 and 36,207.30 is: 49,964.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,422.63 : 91,660.61 = 36,207.30 : x
  2. Step 2: Convert to fraction form
    66,422.63/91,660.61 = 36,207.30/x
  3. Step 3: Cross multiply
    66,422.63x = 91,660.61 × 36,207.30
  4. Step 4: Simplify right side
    66,422.63x = 3,318,783,638.70
  5. Step 5: Solve for x
    x = 3,318,783,638.70/66,422.63
  6. Step 6: Final answer
    x = 49,964.65

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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.