Home / 138,175.45-190,704.99-87,215.92

Finding the Fourth Proportional to 138,175.45, 190,704.99 and 87,215.92

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Solution

The fourth proportional to 138,175.45, 190,704.99 and 87,215.92 is: 120,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,175.45 : 190,704.99 = 87,215.92 : x
  2. Step 2: Convert to fraction form
    138,175.45/190,704.99 = 87,215.92/x
  3. Step 3: Cross multiply
    138,175.45x = 190,704.99 × 87,215.92
  4. Step 4: Simplify right side
    138,175.45x = 16,632,511,151.44
  5. Step 5: Solve for x
    x = 16,632,511,151.44/138,175.45
  6. Step 6: Final answer
    x = 120,372.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.