Home / 137,932.40-206,898.60-81,945.20

Finding the Fourth Proportional to 137,932.40, 206,898.60 and 81,945.20

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Solution

The fourth proportional to 137,932.40, 206,898.60 and 81,945.20 is: 122,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,932.40 : 206,898.60 = 81,945.20 : x
  2. Step 2: Convert to fraction form
    137,932.40/206,898.60 = 81,945.20/x
  3. Step 3: Cross multiply
    137,932.40x = 206,898.60 × 81,945.20
  4. Step 4: Simplify right side
    137,932.40x = 16,954,347,156.72
  5. Step 5: Solve for x
    x = 16,954,347,156.72/137,932.40
  6. Step 6: Final answer
    x = 122,917.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.