Home / 215,031.15-322,551.17-78,249.57

Finding the Fourth Proportional to 215,031.15, 322,551.17 and 78,249.57

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Solution

The fourth proportional to 215,031.15, 322,551.17 and 78,249.57 is: 117,375.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,031.15 : 322,551.17 = 78,249.57 : x
  2. Step 2: Convert to fraction form
    215,031.15/322,551.17 = 78,249.57/x
  3. Step 3: Cross multiply
    215,031.15x = 322,551.17 × 78,249.57
  4. Step 4: Simplify right side
    215,031.15x = 25,239,490,355.50
  5. Step 5: Solve for x
    x = 25,239,490,355.50/215,031.15
  6. Step 6: Final answer
    x = 117,375.97

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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.