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Finding the Fourth Proportional to 66,515.58, 99,769.73 and 40,213.26

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Solution

The fourth proportional to 66,515.58, 99,769.73 and 40,213.26 is: 60,317.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,515.58 : 99,769.73 = 40,213.26 : x
  2. Step 2: Convert to fraction form
    66,515.58/99,769.73 = 40,213.26/x
  3. Step 3: Cross multiply
    66,515.58x = 99,769.73 × 40,213.26
  4. Step 4: Simplify right side
    66,515.58x = 4,012,065,891.55
  5. Step 5: Solve for x
    x = 4,012,065,891.55/66,515.58
  6. Step 6: Final answer
    x = 60,317.69

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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.