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Finding the Fourth Proportional to 57,310.80, 85,966.20 and 53,422.80

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Solution

The fourth proportional to 57,310.80, 85,966.20 and 53,422.80 is: 80,134.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,310.80 : 85,966.20 = 53,422.80 : x
  2. Step 2: Convert to fraction form
    57,310.80/85,966.20 = 53,422.80/x
  3. Step 3: Cross multiply
    57,310.80x = 85,966.20 × 53,422.80
  4. Step 4: Simplify right side
    57,310.80x = 4,592,555,109.36
  5. Step 5: Solve for x
    x = 4,592,555,109.36/57,310.80
  6. Step 6: Final answer
    x = 80,134.20

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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.