Home / 128,729,991.60-192,945,688.20-52,002,644.40

Finding the Fourth Proportional to 128,729,991.60, 192,945,688.20 and 52,002,644.40

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Solution

The fourth proportional to 128,729,991.60, 192,945,688.20 and 52,002,644.40 is: 77,943,654.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,729,991.60 : 192,945,688.20 = 52,002,644.40 : x
  2. Step 2: Convert to fraction form
    128,729,991.60/192,945,688.20 = 52,002,644.40/x
  3. Step 3: Cross multiply
    128,729,991.60x = 192,945,688.20 × 52,002,644.40
  4. Step 4: Simplify right side
    128,729,991.60x = 10,033,686,011,977,876
  5. Step 5: Solve for x
    x = 10,033,686,011,977,876/128,729,991.60
  6. Step 6: Final answer
    x = 77,943,654.68

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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.