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Finding the Fourth Proportional to 87,689,768.70, 122,967,230.10 and 87,689,768.70

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Solution

The fourth proportional to 87,689,768.70, 122,967,230.10 and 87,689,768.70 is: 122,967,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689,768.70 : 122,967,230.10 = 87,689,768.70 : x
  2. Step 2: Convert to fraction form
    87,689,768.70/122,967,230.10 = 87,689,768.70/x
  3. Step 3: Cross multiply
    87,689,768.70x = 122,967,230.10 × 87,689,768.70
  4. Step 4: Simplify right side
    87,689,768.70x = 10,782,967,965,148,678
  5. Step 5: Solve for x
    x = 10,782,967,965,148,678/87,689,768.70
  6. Step 6: Final answer
    x = 122,967,230.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.