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Finding the Fourth Proportional to 66,011.62, 91,072.15 and 43,362.80

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Solution

The fourth proportional to 66,011.62, 91,072.15 and 43,362.80 is: 59,824.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,011.62 : 91,072.15 = 43,362.80 : x
  2. Step 2: Convert to fraction form
    66,011.62/91,072.15 = 43,362.80/x
  3. Step 3: Cross multiply
    66,011.62x = 91,072.15 × 43,362.80
  4. Step 4: Simplify right side
    66,011.62x = 3,949,143,426.02
  5. Step 5: Solve for x
    x = 3,949,143,426.02/66,011.62
  6. Step 6: Final answer
    x = 59,824.97

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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.