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Finding the Fourth Proportional to 66,722.40, 99,941.76 and 54,183.60

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Solution

The fourth proportional to 66,722.40, 99,941.76 and 54,183.60 is: 81,160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.40 : 99,941.76 = 54,183.60 : x
  2. Step 2: Convert to fraction form
    66,722.40/99,941.76 = 54,183.60/x
  3. Step 3: Cross multiply
    66,722.40x = 99,941.76 × 54,183.60
  4. Step 4: Simplify right side
    66,722.40x = 5,415,204,347.14
  5. Step 5: Solve for x
    x = 5,415,204,347.14/66,722.40
  6. Step 6: Final answer
    x = 81,160.22

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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.