Home / 87,421.70-131,231.10-57,897.20

Finding the Fourth Proportional to 87,421.70, 131,231.10 and 57,897.20

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Solution

The fourth proportional to 87,421.70, 131,231.10 and 57,897.20 is: 86,911.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,421.70 : 131,231.10 = 57,897.20 : x
  2. Step 2: Convert to fraction form
    87,421.70/131,231.10 = 57,897.20/x
  3. Step 3: Cross multiply
    87,421.70x = 131,231.10 × 57,897.20
  4. Step 4: Simplify right side
    87,421.70x = 7,597,913,242.92
  5. Step 5: Solve for x
    x = 7,597,913,242.92/87,421.70
  6. Step 6: Final answer
    x = 86,911.07

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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.