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Finding the Fourth Proportional to 81,942,930.40, 122,914,395.60 and 81,942,930.40

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Solution

The fourth proportional to 81,942,930.40, 122,914,395.60 and 81,942,930.40 is: 122,914,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,942,930.40 : 122,914,395.60 = 81,942,930.40 : x
  2. Step 2: Convert to fraction form
    81,942,930.40/122,914,395.60 = 81,942,930.40/x
  3. Step 3: Cross multiply
    81,942,930.40x = 122,914,395.60 × 81,942,930.40
  4. Step 4: Simplify right side
    81,942,930.40x = 10,071,965,763,808,866
  5. Step 5: Solve for x
    x = 10,071,965,763,808,866/81,942,930.40
  6. Step 6: Final answer
    x = 122,914,395.60

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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.