Home / 115,399.08-172,129.05-104,768.64

Finding the Fourth Proportional to 115,399.08, 172,129.05 and 104,768.64

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Solution

The fourth proportional to 115,399.08, 172,129.05 and 104,768.64 is: 156,272.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,399.08 : 172,129.05 = 104,768.64 : x
  2. Step 2: Convert to fraction form
    115,399.08/172,129.05 = 104,768.64/x
  3. Step 3: Cross multiply
    115,399.08x = 172,129.05 × 104,768.64
  4. Step 4: Simplify right side
    115,399.08x = 18,033,726,472.99
  5. Step 5: Solve for x
    x = 18,033,726,472.99/115,399.08
  6. Step 6: Final answer
    x = 156,272.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.