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Finding the Fourth Proportional to 81,942,908.40, 122,914,362.60 and 81,942,908.40

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Solution

The fourth proportional to 81,942,908.40, 122,914,362.60 and 81,942,908.40 is: 122,914,362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,942,908.40 : 122,914,362.60 = 81,942,908.40 : x
  2. Step 2: Convert to fraction form
    81,942,908.40/122,914,362.60 = 81,942,908.40/x
  3. Step 3: Cross multiply
    81,942,908.40x = 122,914,362.60 × 81,942,908.40
  4. Step 4: Simplify right side
    81,942,908.40x = 10,071,960,355,576,186
  5. Step 5: Solve for x
    x = 10,071,960,355,576,186/81,942,908.40
  6. Step 6: Final answer
    x = 122,914,362.60

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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.