Home / 213,727.92-320,473.32-87,456.78

Finding the Fourth Proportional to 213,727.92, 320,473.32 and 87,456.78

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Solution

The fourth proportional to 213,727.92, 320,473.32 and 87,456.78 is: 131,136.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,727.92 : 320,473.32 = 87,456.78 : x
  2. Step 2: Convert to fraction form
    213,727.92/320,473.32 = 87,456.78/x
  3. Step 3: Cross multiply
    213,727.92x = 320,473.32 × 87,456.78
  4. Step 4: Simplify right side
    213,727.92x = 28,027,564,643.11
  5. Step 5: Solve for x
    x = 28,027,564,643.11/213,727.92
  6. Step 6: Final answer
    x = 131,136.66

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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.