Home / 149,420.78-206,194.70-81,436.33

Finding the Fourth Proportional to 149,420.78, 206,194.70 and 81,436.33

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Solution

The fourth proportional to 149,420.78, 206,194.70 and 81,436.33 is: 112,378.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,420.78 : 206,194.70 = 81,436.33 : x
  2. Step 2: Convert to fraction form
    149,420.78/206,194.70 = 81,436.33/x
  3. Step 3: Cross multiply
    149,420.78x = 206,194.70 × 81,436.33
  4. Step 4: Simplify right side
    149,420.78x = 16,791,739,226.27
  5. Step 5: Solve for x
    x = 16,791,739,226.27/149,420.78
  6. Step 6: Final answer
    x = 112,378.87

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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.