Home / 137,479.16-189,712.26-80,879.60

Finding the Fourth Proportional to 137,479.16, 189,712.26 and 80,879.60

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Solution

The fourth proportional to 137,479.16, 189,712.26 and 80,879.60 is: 111,608.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,479.16 : 189,712.26 = 80,879.60 : x
  2. Step 2: Convert to fraction form
    137,479.16/189,712.26 = 80,879.60/x
  3. Step 3: Cross multiply
    137,479.16x = 189,712.26 × 80,879.60
  4. Step 4: Simplify right side
    137,479.16x = 15,343,851,703.90
  5. Step 5: Solve for x
    x = 15,343,851,703.90/137,479.16
  6. Step 6: Final answer
    x = 111,608.56

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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.