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Finding the Third Proportional to 70,138.50 and 149,438.50

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Solution

The third proportional to 70,138.50 and 149,438.50 is: 318,396.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,138.50 : 149,438.50 = 149,438.50 : x
  2. Step 2: Convert to fraction form
    70,138.50/149,438.50 = 149,438.50/x
  3. Step 3: Cross multiply
    70,138.50x = 149,438.50 × 149,438.50
  4. Step 4: Simplify right side
    70,138.50x = 22,331,865,282.25
  5. Step 5: Solve for x
    x = 22,331,865,282.25/70,138.50
  6. Step 6: Final answer
    x = 318,396.68

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.