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Finding the Fourth Proportional to 87,340.70, 131,109.60 and 57,816.20

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Solution

The fourth proportional to 87,340.70, 131,109.60 and 57,816.20 is: 86,789.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,340.70 : 131,109.60 = 57,816.20 : x
  2. Step 2: Convert to fraction form
    87,340.70/131,109.60 = 57,816.20/x
  3. Step 3: Cross multiply
    87,340.70x = 131,109.60 × 57,816.20
  4. Step 4: Simplify right side
    87,340.70x = 7,580,258,855.52
  5. Step 5: Solve for x
    x = 7,580,258,855.52/87,340.70
  6. Step 6: Final answer
    x = 86,789.54

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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.