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Finding the Fourth Proportional to 215,847.90, 324,063.45 and 137,115.90

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Solution

The fourth proportional to 215,847.90, 324,063.45 and 137,115.90 is: 205,859.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,847.90 : 324,063.45 = 137,115.90 : x
  2. Step 2: Convert to fraction form
    215,847.90/324,063.45 = 137,115.90/x
  3. Step 3: Cross multiply
    215,847.90x = 324,063.45 × 137,115.90
  4. Step 4: Simplify right side
    215,847.90x = 44,434,251,603.86
  5. Step 5: Solve for x
    x = 44,434,251,603.86/215,847.90
  6. Step 6: Final answer
    x = 205,859.09

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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.