Home / 143,764.80-215,906.40-139,099.20

Finding the Fourth Proportional to 143,764.80, 215,906.40 and 139,099.20

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Solution

The fourth proportional to 143,764.80, 215,906.40 and 139,099.20 is: 208,899.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,764.80 : 215,906.40 = 139,099.20 : x
  2. Step 2: Convert to fraction form
    143,764.80/215,906.40 = 139,099.20/x
  3. Step 3: Cross multiply
    143,764.80x = 215,906.40 × 139,099.20
  4. Step 4: Simplify right side
    143,764.80x = 30,032,407,514.88
  5. Step 5: Solve for x
    x = 30,032,407,514.88/143,764.80
  6. Step 6: Final answer
    x = 208,899.59

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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.