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Finding the Third Proportional to 156,939 and 201,503.50

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Solution

The third proportional to 156,939 and 201,503.50 is: 258,722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,939 : 201,503.50 = 201,503.50 : x
  2. Step 2: Convert to fraction form
    156,939/201,503.50 = 201,503.50/x
  3. Step 3: Cross multiply
    156,939x = 201,503.50 × 201,503.50
  4. Step 4: Simplify right side
    156,939x = 40,603,660,512.25
  5. Step 5: Solve for x
    x = 40,603,660,512.25/156,939
  6. Step 6: Final answer
    x = 258,722.56

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.