Home / 149,126.82-205,788.84-81,144.06

Finding the Fourth Proportional to 149,126.82, 205,788.84 and 81,144.06

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Solution

The fourth proportional to 149,126.82, 205,788.84 and 81,144.06 is: 111,975.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,126.82 : 205,788.84 = 81,144.06 : x
  2. Step 2: Convert to fraction form
    149,126.82/205,788.84 = 81,144.06/x
  3. Step 3: Cross multiply
    149,126.82x = 205,788.84 × 81,144.06
  4. Step 4: Simplify right side
    149,126.82x = 16,698,541,980.29
  5. Step 5: Solve for x
    x = 16,698,541,980.29/149,126.82
  6. Step 6: Final answer
    x = 111,975.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.