Home / 221,128.84-331,589.52-80,789.32

Finding the Fourth Proportional to 221,128.84, 331,589.52 and 80,789.32

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Solution

The fourth proportional to 221,128.84, 331,589.52 and 80,789.32 is: 121,146.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,128.84 : 331,589.52 = 80,789.32 : x
  2. Step 2: Convert to fraction form
    221,128.84/331,589.52 = 80,789.32/x
  3. Step 3: Cross multiply
    221,128.84x = 331,589.52 × 80,789.32
  4. Step 4: Simplify right side
    221,128.84x = 26,788,891,839.93
  5. Step 5: Solve for x
    x = 26,788,891,839.93/221,128.84
  6. Step 6: Final answer
    x = 121,146.08

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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.