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Finding the Fourth Proportional to 149,238.92, 205,916.37 and 125,137.37

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Solution

The fourth proportional to 149,238.92, 205,916.37 and 125,137.37 is: 172,661.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,238.92 : 205,916.37 = 125,137.37 : x
  2. Step 2: Convert to fraction form
    149,238.92/205,916.37 = 125,137.37/x
  3. Step 3: Cross multiply
    149,238.92x = 205,916.37 × 125,137.37
  4. Step 4: Simplify right side
    149,238.92x = 25,767,832,981.75
  5. Step 5: Solve for x
    x = 25,767,832,981.75/149,238.92
  6. Step 6: Final answer
    x = 172,661.62

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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.