Home / 87,840.40-131,760.60-66,845.20

Finding the Fourth Proportional to 87,840.40, 131,760.60 and 66,845.20

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Solution

The fourth proportional to 87,840.40, 131,760.60 and 66,845.20 is: 100,267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,840.40 : 131,760.60 = 66,845.20 : x
  2. Step 2: Convert to fraction form
    87,840.40/131,760.60 = 66,845.20/x
  3. Step 3: Cross multiply
    87,840.40x = 131,760.60 × 66,845.20
  4. Step 4: Simplify right side
    87,840.40x = 8,807,563,659.12
  5. Step 5: Solve for x
    x = 8,807,563,659.12/87,840.40
  6. Step 6: Final answer
    x = 100,267.80

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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.