Home / 87,665.68-131,498.51-72,885.20

Finding the Fourth Proportional to 87,665.68, 131,498.51 and 72,885.20

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Solution

The fourth proportional to 87,665.68, 131,498.51 and 72,885.20 is: 109,327.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,665.68 : 131,498.51 = 72,885.20 : x
  2. Step 2: Convert to fraction form
    87,665.68/131,498.51 = 72,885.20/x
  3. Step 3: Cross multiply
    87,665.68x = 131,498.51 × 72,885.20
  4. Step 4: Simplify right side
    87,665.68x = 9,584,295,383.27
  5. Step 5: Solve for x
    x = 9,584,295,383.27/87,665.68
  6. Step 6: Final answer
    x = 109,327.80

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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.