Home / 159,131.76-219,603.36-87,512.28

Finding the Fourth Proportional to 159,131.76, 219,603.36 and 87,512.28

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Solution

The fourth proportional to 159,131.76, 219,603.36 and 87,512.28 is: 120,767.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,131.76 : 219,603.36 = 87,512.28 : x
  2. Step 2: Convert to fraction form
    159,131.76/219,603.36 = 87,512.28/x
  3. Step 3: Cross multiply
    159,131.76x = 219,603.36 × 87,512.28
  4. Step 4: Simplify right side
    159,131.76x = 19,217,990,729.26
  5. Step 5: Solve for x
    x = 19,217,990,729.26/159,131.76
  6. Step 6: Final answer
    x = 120,767.79

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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.