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Finding the Fourth Proportional to 221,956.72, 306,301.56 and 121,354.72

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Solution

The fourth proportional to 221,956.72, 306,301.56 and 121,354.72 is: 167,470.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,956.72 : 306,301.56 = 121,354.72 : x
  2. Step 2: Convert to fraction form
    221,956.72/306,301.56 = 121,354.72/x
  3. Step 3: Cross multiply
    221,956.72x = 306,301.56 × 121,354.72
  4. Step 4: Simplify right side
    221,956.72x = 37,171,140,049.36
  5. Step 5: Solve for x
    x = 37,171,140,049.36/221,956.72
  6. Step 6: Final answer
    x = 167,470.22

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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.