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Finding the Fourth Proportional to 66,491.97, 91,792.79 and 51,350.64

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Solution

The fourth proportional to 66,491.97, 91,792.79 and 51,350.64 is: 70,890.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.97 : 91,792.79 = 51,350.64 : x
  2. Step 2: Convert to fraction form
    66,491.97/91,792.79 = 51,350.64/x
  3. Step 3: Cross multiply
    66,491.97x = 91,792.79 × 51,350.64
  4. Step 4: Simplify right side
    66,491.97x = 4,713,618,513.89
  5. Step 5: Solve for x
    x = 4,713,618,513.89/66,491.97
  6. Step 6: Final answer
    x = 70,890.04

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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.