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Finding the Fourth Proportional to 221,906, 306,230.28 and 121,304.72

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Solution

The fourth proportional to 221,906, 306,230.28 and 121,304.72 is: 167,400.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,906 : 306,230.28 = 121,304.72 : x
  2. Step 2: Convert to fraction form
    221,906/306,230.28 = 121,304.72/x
  3. Step 3: Cross multiply
    221,906x = 306,230.28 × 121,304.72
  4. Step 4: Simplify right side
    221,906x = 37,147,178,370.92
  5. Step 5: Solve for x
    x = 37,147,178,370.92/221,906
  6. Step 6: Final answer
    x = 167,400.51

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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.