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Finding the Third Proportional to 137,878.50 and 221,214.75

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Solution

The third proportional to 137,878.50 and 221,214.75 is: 354,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,878.50 : 221,214.75 = 221,214.75 : x
  2. Step 2: Convert to fraction form
    137,878.50/221,214.75 = 221,214.75/x
  3. Step 3: Cross multiply
    137,878.50x = 221,214.75 × 221,214.75
  4. Step 4: Simplify right side
    137,878.50x = 48,935,965,617.56
  5. Step 5: Solve for x
    x = 48,935,965,617.56/137,878.50
  6. Step 6: Final answer
    x = 354,920.93

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.