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Finding the Fourth Proportional to 66,283.19, 99,424.79 and 54,571.80

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Solution

The fourth proportional to 66,283.19, 99,424.79 and 54,571.80 is: 81,857.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,283.19 : 99,424.79 = 54,571.80 : x
  2. Step 2: Convert to fraction form
    66,283.19/99,424.79 = 54,571.80/x
  3. Step 3: Cross multiply
    66,283.19x = 99,424.79 × 54,571.80
  4. Step 4: Simplify right side
    66,283.19x = 5,425,789,854.91
  5. Step 5: Solve for x
    x = 5,425,789,854.91/66,283.19
  6. Step 6: Final answer
    x = 81,857.71

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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.