Home / 87,615.20-131,422.80-86,837.60

Finding the Fourth Proportional to 87,615.20, 131,422.80 and 86,837.60

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Solution

The fourth proportional to 87,615.20, 131,422.80 and 86,837.60 is: 130,256.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,615.20 : 131,422.80 = 86,837.60 : x
  2. Step 2: Convert to fraction form
    87,615.20/131,422.80 = 86,837.60/x
  3. Step 3: Cross multiply
    87,615.20x = 131,422.80 × 86,837.60
  4. Step 4: Simplify right side
    87,615.20x = 11,412,440,537.28
  5. Step 5: Solve for x
    x = 11,412,440,537.28/87,615.20
  6. Step 6: Final answer
    x = 130,256.40

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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.