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Finding the Fourth Proportional to 223,881.70, 308,956.26 and 121,905.58

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Solution

The fourth proportional to 223,881.70, 308,956.26 and 121,905.58 is: 168,229.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,881.70 : 308,956.26 = 121,905.58 : x
  2. Step 2: Convert to fraction form
    223,881.70/308,956.26 = 121,905.58/x
  3. Step 3: Cross multiply
    223,881.70x = 308,956.26 × 121,905.58
  4. Step 4: Simplify right side
    223,881.70x = 37,663,492,069.93
  5. Step 5: Solve for x
    x = 37,663,492,069.93/223,881.70
  6. Step 6: Final answer
    x = 168,229.44

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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.