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Finding the Fourth Proportional to 9,781,939.20, 14,672,908.80 and 7,542,451.20

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Solution

The fourth proportional to 9,781,939.20, 14,672,908.80 and 7,542,451.20 is: 11,313,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,781,939.20 : 14,672,908.80 = 7,542,451.20 : x
  2. Step 2: Convert to fraction form
    9,781,939.20/14,672,908.80 = 7,542,451.20/x
  3. Step 3: Cross multiply
    9,781,939.20x = 14,672,908.80 × 7,542,451.20
  4. Step 4: Simplify right side
    9,781,939.20x = 110,669,698,586,050.56
  5. Step 5: Solve for x
    x = 110,669,698,586,050.56/9,781,939.20
  6. Step 6: Final answer
    x = 11,313,676.80

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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.