Home / 90,181.88-135,043.98-54,135.91

Finding the Fourth Proportional to 90,181.88, 135,043.98 and 54,135.91

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Solution

The fourth proportional to 90,181.88, 135,043.98 and 54,135.91 is: 81,066.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,181.88 : 135,043.98 = 54,135.91 : x
  2. Step 2: Convert to fraction form
    90,181.88/135,043.98 = 54,135.91/x
  3. Step 3: Cross multiply
    90,181.88x = 135,043.98 × 54,135.91
  4. Step 4: Simplify right side
    90,181.88x = 7,310,728,072.10
  5. Step 5: Solve for x
    x = 7,310,728,072.10/90,181.88
  6. Step 6: Final answer
    x = 81,066.49

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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.