Home / 87,109.20-130,372.20-76,611.60

Finding the Fourth Proportional to 87,109.20, 130,372.20 and 76,611.60

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Solution

The fourth proportional to 87,109.20, 130,372.20 and 76,611.60 is: 114,660.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,109.20 : 130,372.20 = 76,611.60 : x
  2. Step 2: Convert to fraction form
    87,109.20/130,372.20 = 76,611.60/x
  3. Step 3: Cross multiply
    87,109.20x = 130,372.20 × 76,611.60
  4. Step 4: Simplify right side
    87,109.20x = 9,988,022,837.52
  5. Step 5: Solve for x
    x = 9,988,022,837.52/87,109.20
  6. Step 6: Final answer
    x = 114,660.94

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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.