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Finding the Fourth Proportional to 223,894.61, 308,982.20 and 121,921.82

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Solution

The fourth proportional to 223,894.61, 308,982.20 and 121,921.82 is: 168,256.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,894.61 : 308,982.20 = 121,921.82 : x
  2. Step 2: Convert to fraction form
    223,894.61/308,982.20 = 121,921.82/x
  3. Step 3: Cross multiply
    223,894.61x = 308,982.20 × 121,921.82
  4. Step 4: Simplify right side
    223,894.61x = 37,671,672,171.60
  5. Step 5: Solve for x
    x = 37,671,672,171.60/223,894.61
  6. Step 6: Final answer
    x = 168,256.27

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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.