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Finding the Fourth Proportional to 223,791.80, 308,839.64 and 121,824.05

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Solution

The fourth proportional to 223,791.80, 308,839.64 and 121,824.05 is: 168,120.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,791.80 : 308,839.64 = 121,824.05 : x
  2. Step 2: Convert to fraction form
    223,791.80/308,839.64 = 121,824.05/x
  3. Step 3: Cross multiply
    223,791.80x = 308,839.64 × 121,824.05
  4. Step 4: Simplify right side
    223,791.80x = 37,624,095,277.80
  5. Step 5: Solve for x
    x = 37,624,095,277.80/223,791.80
  6. Step 6: Final answer
    x = 168,120.98

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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.