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Finding the Fourth Proportional to 215,909.81, 297,859.17 and 125,213.21

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Solution

The fourth proportional to 215,909.81, 297,859.17 and 125,213.21 is: 172,738.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,909.81 : 297,859.17 = 125,213.21 : x
  2. Step 2: Convert to fraction form
    215,909.81/297,859.17 = 125,213.21/x
  3. Step 3: Cross multiply
    215,909.81x = 297,859.17 × 125,213.21
  4. Step 4: Simplify right side
    215,909.81x = 37,295,902,736.79
  5. Step 5: Solve for x
    x = 37,295,902,736.79/215,909.81
  6. Step 6: Final answer
    x = 172,738.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.