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Finding the Fourth Proportional to 137,796,231.70, 206,694,347.55 and 68,921,478.10

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Solution

The fourth proportional to 137,796,231.70, 206,694,347.55 and 68,921,478.10 is: 103,382,217.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,796,231.70 : 206,694,347.55 = 68,921,478.10 : x
  2. Step 2: Convert to fraction form
    137,796,231.70/206,694,347.55 = 68,921,478.10/x
  3. Step 3: Cross multiply
    137,796,231.70x = 206,694,347.55 × 68,921,478.10
  4. Step 4: Simplify right side
    137,796,231.70x = 14,245,679,948,061,114
  5. Step 5: Solve for x
    x = 14,245,679,948,061,114/137,796,231.70
  6. Step 6: Final answer
    x = 103,382,217.15

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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.