Home / 149,764.81-206,683.79-81,788.09

Finding the Fourth Proportional to 149,764.81, 206,683.79 and 81,788.09

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Solution

The fourth proportional to 149,764.81, 206,683.79 and 81,788.09 is: 112,872.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,764.81 : 206,683.79 = 81,788.09 : x
  2. Step 2: Convert to fraction form
    149,764.81/206,683.79 = 81,788.09/x
  3. Step 3: Cross multiply
    149,764.81x = 206,683.79 × 81,788.09
  4. Step 4: Simplify right side
    149,764.81x = 16,904,272,418.06
  5. Step 5: Solve for x
    x = 16,904,272,418.06/149,764.81
  6. Step 6: Final answer
    x = 112,872.13

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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.