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Finding the Fourth Proportional to 223,687.88, 308,679.96 and 121,713.74

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Solution

The fourth proportional to 223,687.88, 308,679.96 and 121,713.74 is: 167,959.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,687.88 : 308,679.96 = 121,713.74 : x
  2. Step 2: Convert to fraction form
    223,687.88/308,679.96 = 121,713.74/x
  3. Step 3: Cross multiply
    223,687.88x = 308,679.96 × 121,713.74
  4. Step 4: Simplify right side
    223,687.88x = 37,570,592,394.65
  5. Step 5: Solve for x
    x = 37,570,592,394.65/223,687.88
  6. Step 6: Final answer
    x = 167,959.89

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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.