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Finding the Fourth Proportional to 66,435.20, 99,685.20 and 50,634.80

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Solution

The fourth proportional to 66,435.20, 99,685.20 and 50,634.80 is: 75,976.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435.20 : 99,685.20 = 50,634.80 : x
  2. Step 2: Convert to fraction form
    66,435.20/99,685.20 = 50,634.80/x
  3. Step 3: Cross multiply
    66,435.20x = 99,685.20 × 50,634.80
  4. Step 4: Simplify right side
    66,435.20x = 5,047,540,164.96
  5. Step 5: Solve for x
    x = 5,047,540,164.96/66,435.20
  6. Step 6: Final answer
    x = 75,976.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.