Home / 115,857-173,399.76-87,621.48

Finding the Fourth Proportional to 115,857, 173,399.76 and 87,621.48

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Solution

The fourth proportional to 115,857, 173,399.76 and 87,621.48 is: 131,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,857 : 173,399.76 = 87,621.48 : x
  2. Step 2: Convert to fraction form
    115,857/173,399.76 = 87,621.48/x
  3. Step 3: Cross multiply
    115,857x = 173,399.76 × 87,621.48
  4. Step 4: Simplify right side
    115,857x = 15,193,543,602.84
  5. Step 5: Solve for x
    x = 15,193,543,602.84/115,857
  6. Step 6: Final answer
    x = 131,140.49

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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.