Home / 208,115.55-312,138.15-58,321.40

Finding the Fourth Proportional to 208,115.55, 312,138.15 and 58,321.40

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Solution

The fourth proportional to 208,115.55, 312,138.15 and 58,321.40 is: 87,472.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,115.55 : 312,138.15 = 58,321.40 : x
  2. Step 2: Convert to fraction form
    208,115.55/312,138.15 = 58,321.40/x
  3. Step 3: Cross multiply
    208,115.55x = 312,138.15 × 58,321.40
  4. Step 4: Simplify right side
    208,115.55x = 18,204,332,122.01
  5. Step 5: Solve for x
    x = 18,204,332,122.01/208,115.55
  6. Step 6: Final answer
    x = 87,472.23

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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.