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Finding the Fourth Proportional to 221,207.91, 331,601.66 and 141,020.79

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Solution

The fourth proportional to 221,207.91, 331,601.66 and 141,020.79 is: 211,397.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,207.91 : 331,601.66 = 141,020.79 : x
  2. Step 2: Convert to fraction form
    221,207.91/331,601.66 = 141,020.79/x
  3. Step 3: Cross multiply
    221,207.91x = 331,601.66 × 141,020.79
  4. Step 4: Simplify right side
    221,207.91x = 46,762,727,353.41
  5. Step 5: Solve for x
    x = 46,762,727,353.41/221,207.91
  6. Step 6: Final answer
    x = 211,397.18

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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.