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Finding the Fourth Proportional to 66,315.25, 99,473.90 and 36,919.92

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Solution

The fourth proportional to 66,315.25, 99,473.90 and 36,919.92 is: 55,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,315.25 : 99,473.90 = 36,919.92 : x
  2. Step 2: Convert to fraction form
    66,315.25/99,473.90 = 36,919.92/x
  3. Step 3: Cross multiply
    66,315.25x = 99,473.90 × 36,919.92
  4. Step 4: Simplify right side
    66,315.25x = 3,672,568,266.65
  5. Step 5: Solve for x
    x = 3,672,568,266.65/66,315.25
  6. Step 6: Final answer
    x = 55,380.45

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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.