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Finding the Fourth Proportional to 87,372.80, 131,059.20 and 57,629.60

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Solution

The fourth proportional to 87,372.80, 131,059.20 and 57,629.60 is: 86,444.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,372.80 : 131,059.20 = 57,629.60 : x
  2. Step 2: Convert to fraction form
    87,372.80/131,059.20 = 57,629.60/x
  3. Step 3: Cross multiply
    87,372.80x = 131,059.20 × 57,629.60
  4. Step 4: Simplify right side
    87,372.80x = 7,552,889,272.32
  5. Step 5: Solve for x
    x = 7,552,889,272.32/87,372.80
  6. Step 6: Final answer
    x = 86,444.40

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1.5x scale

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.