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Finding the Fourth Proportional to 222,312.78, 306,791.64 and 121,710.78

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Solution

The fourth proportional to 222,312.78, 306,791.64 and 121,710.78 is: 167,960.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,312.78 : 306,791.64 = 121,710.78 : x
  2. Step 2: Convert to fraction form
    222,312.78/306,791.64 = 121,710.78/x
  3. Step 3: Cross multiply
    222,312.78x = 306,791.64 × 121,710.78
  4. Step 4: Simplify right side
    222,312.78x = 37,339,849,801.88
  5. Step 5: Solve for x
    x = 37,339,849,801.88/222,312.78
  6. Step 6: Final answer
    x = 167,960.88

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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.