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Finding the Fourth Proportional to 251,790.72, 378,058.32 and 168,072.48

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Solution

The fourth proportional to 251,790.72, 378,058.32 and 168,072.48 is: 252,357.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,790.72 : 378,058.32 = 168,072.48 : x
  2. Step 2: Convert to fraction form
    251,790.72/378,058.32 = 168,072.48/x
  3. Step 3: Cross multiply
    251,790.72x = 378,058.32 × 168,072.48
  4. Step 4: Simplify right side
    251,790.72x = 63,541,199,427.03
  5. Step 5: Solve for x
    x = 63,541,199,427.03/251,790.72
  6. Step 6: Final answer
    x = 252,357.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.