Home / 115,414.32-172,665.99-87,415.05

Finding the Fourth Proportional to 115,414.32, 172,665.99 and 87,415.05

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Solution

The fourth proportional to 115,414.32, 172,665.99 and 87,415.05 is: 130,777.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,414.32 : 172,665.99 = 87,415.05 : x
  2. Step 2: Convert to fraction form
    115,414.32/172,665.99 = 87,415.05/x
  3. Step 3: Cross multiply
    115,414.32x = 172,665.99 × 87,415.05
  4. Step 4: Simplify right side
    115,414.32x = 15,093,606,149.15
  5. Step 5: Solve for x
    x = 15,093,606,149.15/115,414.32
  6. Step 6: Final answer
    x = 130,777.59

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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.