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Finding the Fourth Proportional to 223,887.45, 308,964.20 and 121,911.33

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Solution

The fourth proportional to 223,887.45, 308,964.20 and 121,911.33 is: 168,237.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,887.45 : 308,964.20 = 121,911.33 : x
  2. Step 2: Convert to fraction form
    223,887.45/308,964.20 = 121,911.33/x
  3. Step 3: Cross multiply
    223,887.45x = 308,964.20 × 121,911.33
  4. Step 4: Simplify right side
    223,887.45x = 37,666,235,934.83
  5. Step 5: Solve for x
    x = 37,666,235,934.83/223,887.45
  6. Step 6: Final answer
    x = 168,237.37

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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.