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Finding the Fourth Proportional to 149,149.71, 205,826.63 and 82,081.71

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Solution

The fourth proportional to 149,149.71, 205,826.63 and 82,081.71 is: 113,272.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,149.71 : 205,826.63 = 82,081.71 : x
  2. Step 2: Convert to fraction form
    149,149.71/205,826.63 = 82,081.71/x
  3. Step 3: Cross multiply
    149,149.71x = 205,826.63 × 82,081.71
  4. Step 4: Simplify right side
    149,149.71x = 16,894,601,343.53
  5. Step 5: Solve for x
    x = 16,894,601,343.53/149,149.71
  6. Step 6: Final answer
    x = 113,272.77

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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.