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Finding the Fourth Proportional to 56,140.80, 84,211.20 and 33,687.60

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Solution

The fourth proportional to 56,140.80, 84,211.20 and 33,687.60 is: 50,531.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,140.80 : 84,211.20 = 33,687.60 : x
  2. Step 2: Convert to fraction form
    56,140.80/84,211.20 = 33,687.60/x
  3. Step 3: Cross multiply
    56,140.80x = 84,211.20 × 33,687.60
  4. Step 4: Simplify right side
    56,140.80x = 2,836,873,221.12
  5. Step 5: Solve for x
    x = 2,836,873,221.12/56,140.80
  6. Step 6: Final answer
    x = 50,531.40

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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.