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Finding the Fourth Proportional to 146,721.20, 220,081.80 and 106,869.20

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Solution

The fourth proportional to 146,721.20, 220,081.80 and 106,869.20 is: 160,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,721.20 : 220,081.80 = 106,869.20 : x
  2. Step 2: Convert to fraction form
    146,721.20/220,081.80 = 106,869.20/x
  3. Step 3: Cross multiply
    146,721.20x = 220,081.80 × 106,869.20
  4. Step 4: Simplify right side
    146,721.20x = 23,519,965,900.56
  5. Step 5: Solve for x
    x = 23,519,965,900.56/146,721.20
  6. Step 6: Final answer
    x = 160,303.80

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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.