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Finding the Fourth Proportional to 87,885.81, 131,828.72 and 21,324.87

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Solution

The fourth proportional to 87,885.81, 131,828.72 and 21,324.87 is: 31,987.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,885.81 : 131,828.72 = 21,324.87 : x
  2. Step 2: Convert to fraction form
    87,885.81/131,828.72 = 21,324.87/x
  3. Step 3: Cross multiply
    87,885.81x = 131,828.72 × 21,324.87
  4. Step 4: Simplify right side
    87,885.81x = 2,811,230,209.64
  5. Step 5: Solve for x
    x = 2,811,230,209.64/87,885.81
  6. Step 6: Final answer
    x = 31,987.31

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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.