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Finding the Fourth Proportional to 221,843.34, 306,143.82 and 121,241.34

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Solution

The fourth proportional to 221,843.34, 306,143.82 and 121,241.34 is: 167,313.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,843.34 : 306,143.82 = 121,241.34 : x
  2. Step 2: Convert to fraction form
    221,843.34/306,143.82 = 121,241.34/x
  3. Step 3: Cross multiply
    221,843.34x = 306,143.82 × 121,241.34
  4. Step 4: Simplify right side
    221,843.34x = 37,117,286,969.52
  5. Step 5: Solve for x
    x = 37,117,286,969.52/221,843.34
  6. Step 6: Final answer
    x = 167,313.06

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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.