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Finding the Fourth Proportional to 221,960, 306,304.82 and 121,358

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Solution

The fourth proportional to 221,960, 306,304.82 and 121,358 is: 167,474.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,960 : 306,304.82 = 121,358 : x
  2. Step 2: Convert to fraction form
    221,960/306,304.82 = 121,358/x
  3. Step 3: Cross multiply
    221,960x = 306,304.82 × 121,358
  4. Step 4: Simplify right side
    221,960x = 37,172,540,345.56
  5. Step 5: Solve for x
    x = 37,172,540,345.56/221,960
  6. Step 6: Final answer
    x = 167,474.05

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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.