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Finding the Fourth Proportional to 243,886.30, 336,415.76 and 161,100.79

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Solution

The fourth proportional to 243,886.30, 336,415.76 and 161,100.79 is: 222,221.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,886.30 : 336,415.76 = 161,100.79 : x
  2. Step 2: Convert to fraction form
    243,886.30/336,415.76 = 161,100.79/x
  3. Step 3: Cross multiply
    243,886.30x = 336,415.76 × 161,100.79
  4. Step 4: Simplify right side
    243,886.30x = 54,196,843,898.95
  5. Step 5: Solve for x
    x = 54,196,843,898.95/243,886.30
  6. Step 6: Final answer
    x = 222,221.76

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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.