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Finding the Fourth Proportional to 140,003.80, 210,005.70 and 51,260.20

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Solution

The fourth proportional to 140,003.80, 210,005.70 and 51,260.20 is: 76,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,003.80 : 210,005.70 = 51,260.20 : x
  2. Step 2: Convert to fraction form
    140,003.80/210,005.70 = 51,260.20/x
  3. Step 3: Cross multiply
    140,003.80x = 210,005.70 × 51,260.20
  4. Step 4: Simplify right side
    140,003.80x = 10,764,934,183.14
  5. Step 5: Solve for x
    x = 10,764,934,183.14/140,003.80
  6. Step 6: Final answer
    x = 76,890.30

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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.