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Finding the Fourth Proportional to 252,349.18, 378,561.71 and 81,513.88

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Solution

The fourth proportional to 252,349.18, 378,561.71 and 81,513.88 is: 122,283.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,349.18 : 378,561.71 = 81,513.88 : x
  2. Step 2: Convert to fraction form
    252,349.18/378,561.71 = 81,513.88/x
  3. Step 3: Cross multiply
    252,349.18x = 378,561.71 × 81,513.88
  4. Step 4: Simplify right side
    252,349.18x = 30,858,033,058.92
  5. Step 5: Solve for x
    x = 30,858,033,058.92/252,349.18
  6. Step 6: Final answer
    x = 122,283.07

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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.