Home / 137,874.08-190,236.72-80,487.36

Finding the Fourth Proportional to 137,874.08, 190,236.72 and 80,487.36

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Solution

The fourth proportional to 137,874.08, 190,236.72 and 80,487.36 is: 111,055.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,874.08 : 190,236.72 = 80,487.36 : x
  2. Step 2: Convert to fraction form
    137,874.08/190,236.72 = 80,487.36/x
  3. Step 3: Cross multiply
    137,874.08x = 190,236.72 × 80,487.36
  4. Step 4: Simplify right side
    137,874.08x = 15,311,651,367.86
  5. Step 5: Solve for x
    x = 15,311,651,367.86/137,874.08
  6. Step 6: Final answer
    x = 111,055.33

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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.