Home / 213,703.11-320,436.20-87,431.97

Finding the Fourth Proportional to 213,703.11, 320,436.20 and 87,431.97

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Solution

The fourth proportional to 213,703.11, 320,436.20 and 87,431.97 is: 131,099.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,703.11 : 320,436.20 = 87,431.97 : x
  2. Step 2: Convert to fraction form
    213,703.11/320,436.20 = 87,431.97/x
  3. Step 3: Cross multiply
    213,703.11x = 320,436.20 × 87,431.97
  4. Step 4: Simplify right side
    213,703.11x = 28,016,367,788.15
  5. Step 5: Solve for x
    x = 28,016,367,788.15/213,703.11
  6. Step 6: Final answer
    x = 131,099.49

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1.5x scale

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.