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Finding the Fourth Proportional to 12,769,385.80, 19,154,078.70 and 4,250,000.20

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Solution

The fourth proportional to 12,769,385.80, 19,154,078.70 and 4,250,000.20 is: 6,375,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769,385.80 : 19,154,078.70 = 4,250,000.20 : x
  2. Step 2: Convert to fraction form
    12,769,385.80/19,154,078.70 = 4,250,000.20/x
  3. Step 3: Cross multiply
    12,769,385.80x = 19,154,078.70 × 4,250,000.20
  4. Step 4: Simplify right side
    12,769,385.80x = 81,404,838,305,815.73
  5. Step 5: Solve for x
    x = 81,404,838,305,815.73/12,769,385.80
  6. Step 6: Final answer
    x = 6,375,000.30

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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.