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Finding the Fourth Proportional to 137,906.70, 206,860.05 and 102,914.70

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Solution

The fourth proportional to 137,906.70, 206,860.05 and 102,914.70 is: 154,372.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,906.70 : 206,860.05 = 102,914.70 : x
  2. Step 2: Convert to fraction form
    137,906.70/206,860.05 = 102,914.70/x
  3. Step 3: Cross multiply
    137,906.70x = 206,860.05 × 102,914.70
  4. Step 4: Simplify right side
    137,906.70x = 21,288,939,987.74
  5. Step 5: Solve for x
    x = 21,288,939,987.74/137,906.70
  6. Step 6: Final answer
    x = 154,372.05

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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.