Home / 90,631.89-135,729.09-54,504.45

Finding the Fourth Proportional to 90,631.89, 135,729.09 and 54,504.45

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Solution

The fourth proportional to 90,631.89, 135,729.09 and 54,504.45 is: 81,625.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631.89 : 135,729.09 = 54,504.45 : x
  2. Step 2: Convert to fraction form
    90,631.89/135,729.09 = 54,504.45/x
  3. Step 3: Cross multiply
    90,631.89x = 135,729.09 × 54,504.45
  4. Step 4: Simplify right side
    90,631.89x = 7,397,839,399.45
  5. Step 5: Solve for x
    x = 7,397,839,399.45/90,631.89
  6. Step 6: Final answer
    x = 81,625.13

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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.