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Finding the Fourth Proportional to 222,159, 306,579.42 and 121,557

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Solution

The fourth proportional to 222,159, 306,579.42 and 121,557 is: 167,748.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,159 : 306,579.42 = 121,557 : x
  2. Step 2: Convert to fraction form
    222,159/306,579.42 = 121,557/x
  3. Step 3: Cross multiply
    222,159x = 306,579.42 × 121,557
  4. Step 4: Simplify right side
    222,159x = 37,266,874,556.94
  5. Step 5: Solve for x
    x = 37,266,874,556.94/222,159
  6. Step 6: Final answer
    x = 167,748.66

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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.