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Finding the Fourth Proportional to 427,769,728.80, 641,654,593.20 and 104,653,600.80

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Solution

The fourth proportional to 427,769,728.80, 641,654,593.20 and 104,653,600.80 is: 156,980,401.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,769,728.80 : 641,654,593.20 = 104,653,600.80 : x
  2. Step 2: Convert to fraction form
    427,769,728.80/641,654,593.20 = 104,653,600.80/x
  3. Step 3: Cross multiply
    427,769,728.80x = 641,654,593.20 × 104,653,600.80
  4. Step 4: Simplify right side
    427,769,728.80x = 67,151,463,648,239,200
  5. Step 5: Solve for x
    x = 67,151,463,648,239,200/427,769,728.80
  6. Step 6: Final answer
    x = 156,980,401.20

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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.