Home / 87,827.60-131,741.40-86,661.20

Finding the Fourth Proportional to 87,827.60, 131,741.40 and 86,661.20

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Solution

The fourth proportional to 87,827.60, 131,741.40 and 86,661.20 is: 129,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,827.60 : 131,741.40 = 86,661.20 : x
  2. Step 2: Convert to fraction form
    87,827.60/131,741.40 = 86,661.20/x
  3. Step 3: Cross multiply
    87,827.60x = 131,741.40 × 86,661.20
  4. Step 4: Simplify right side
    87,827.60x = 11,416,867,813.68
  5. Step 5: Solve for x
    x = 11,416,867,813.68/87,827.60
  6. Step 6: Final answer
    x = 129,991.80

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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.