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Finding the Fourth Proportional to 215,881.10, 323,819.49 and 121,111.10

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Solution

The fourth proportional to 215,881.10, 323,819.49 and 121,111.10 is: 181,665.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,881.10 : 323,819.49 = 121,111.10 : x
  2. Step 2: Convert to fraction form
    215,881.10/323,819.49 = 121,111.10/x
  3. Step 3: Cross multiply
    215,881.10x = 323,819.49 × 121,111.10
  4. Step 4: Simplify right side
    215,881.10x = 39,218,134,635.34
  5. Step 5: Solve for x
    x = 39,218,134,635.34/215,881.10
  6. Step 6: Final answer
    x = 181,665.44

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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.