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Finding the Fourth Proportional to 90,218.56, 135,058.22 and 54,572.00

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Solution

The fourth proportional to 90,218.56, 135,058.22 and 54,572.00 is: 81,694.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,218.56 : 135,058.22 = 54,572.00 : x
  2. Step 2: Convert to fraction form
    90,218.56/135,058.22 = 54,572.00/x
  3. Step 3: Cross multiply
    90,218.56x = 135,058.22 × 54,572.00
  4. Step 4: Simplify right side
    90,218.56x = 7,370,397,198.04
  5. Step 5: Solve for x
    x = 7,370,397,198.04/90,218.56
  6. Step 6: Final answer
    x = 81,694.91

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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.