Home / 147,939.20-221,471.40-139,288.40

Finding the Fourth Proportional to 147,939.20, 221,471.40 and 139,288.40

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Solution

The fourth proportional to 147,939.20, 221,471.40 and 139,288.40 is: 208,520.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,939.20 : 221,471.40 = 139,288.40 : x
  2. Step 2: Convert to fraction form
    147,939.20/221,471.40 = 139,288.40/x
  3. Step 3: Cross multiply
    147,939.20x = 221,471.40 × 139,288.40
  4. Step 4: Simplify right side
    147,939.20x = 30,848,396,951.76
  5. Step 5: Solve for x
    x = 30,848,396,951.76/147,939.20
  6. Step 6: Final answer
    x = 208,520.78

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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.