Home / 87,869.40-131,813.70-85,104.60

Finding the Fourth Proportional to 87,869.40, 131,813.70 and 85,104.60

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Solution

The fourth proportional to 87,869.40, 131,813.70 and 85,104.60 is: 127,666.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,869.40 : 131,813.70 = 85,104.60 : x
  2. Step 2: Convert to fraction form
    87,869.40/131,813.70 = 85,104.60/x
  3. Step 3: Cross multiply
    87,869.40x = 131,813.70 × 85,104.60
  4. Step 4: Simplify right side
    87,869.40x = 11,217,952,213.02
  5. Step 5: Solve for x
    x = 11,217,952,213.02/87,869.40
  6. Step 6: Final answer
    x = 127,666.20

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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.