Home / 220,789.76-331,320.32-87,646.72

Finding the Fourth Proportional to 220,789.76, 331,320.32 and 87,646.72

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Solution

The fourth proportional to 220,789.76, 331,320.32 and 87,646.72 is: 131,523.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,789.76 : 331,320.32 = 87,646.72 : x
  2. Step 2: Convert to fraction form
    220,789.76/331,320.32 = 87,646.72/x
  3. Step 3: Cross multiply
    220,789.76x = 331,320.32 × 87,646.72
  4. Step 4: Simplify right side
    220,789.76x = 29,039,139,317.35
  5. Step 5: Solve for x
    x = 29,039,139,317.35/220,789.76
  6. Step 6: Final answer
    x = 131,523.94

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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.