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Finding the Third Proportional to 85,153.50 and 128,909.25

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Solution

The third proportional to 85,153.50 and 128,909.25 is: 195,148.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,153.50 : 128,909.25 = 128,909.25 : x
  2. Step 2: Convert to fraction form
    85,153.50/128,909.25 = 128,909.25/x
  3. Step 3: Cross multiply
    85,153.50x = 128,909.25 × 128,909.25
  4. Step 4: Simplify right side
    85,153.50x = 16,617,594,735.56
  5. Step 5: Solve for x
    x = 16,617,594,735.56/85,153.50
  6. Step 6: Final answer
    x = 195,148.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.