Home / 204,821.64-307,021.35-78,427.35

Finding the Fourth Proportional to 204,821.64, 307,021.35 and 78,427.35

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Solution

The fourth proportional to 204,821.64, 307,021.35 and 78,427.35 is: 117,560.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,821.64 : 307,021.35 = 78,427.35 : x
  2. Step 2: Convert to fraction form
    204,821.64/307,021.35 = 78,427.35/x
  3. Step 3: Cross multiply
    204,821.64x = 307,021.35 × 78,427.35
  4. Step 4: Simplify right side
    204,821.64x = 24,078,870,873.92
  5. Step 5: Solve for x
    x = 24,078,870,873.92/204,821.64
  6. Step 6: Final answer
    x = 117,560.19

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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.