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Finding the Fourth Proportional to 66,642.90, 91,964.52 and 36,429.30

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Solution

The fourth proportional to 66,642.90, 91,964.52 and 36,429.30 is: 50,270.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.90 : 91,964.52 = 36,429.30 : x
  2. Step 2: Convert to fraction form
    66,642.90/91,964.52 = 36,429.30/x
  3. Step 3: Cross multiply
    66,642.90x = 91,964.52 × 36,429.30
  4. Step 4: Simplify right side
    66,642.90x = 3,350,203,088.44
  5. Step 5: Solve for x
    x = 3,350,203,088.44/66,642.90
  6. Step 6: Final answer
    x = 50,270.97

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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.