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Finding the Third Proportional to 121,702.50 and 262,129.50

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Solution

The third proportional to 121,702.50 and 262,129.50 is: 564,588.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,702.50 : 262,129.50 = 262,129.50 : x
  2. Step 2: Convert to fraction form
    121,702.50/262,129.50 = 262,129.50/x
  3. Step 3: Cross multiply
    121,702.50x = 262,129.50 × 262,129.50
  4. Step 4: Simplify right side
    121,702.50x = 68,711,874,770.25
  5. Step 5: Solve for x
    x = 68,711,874,770.25/121,702.50
  6. Step 6: Final answer
    x = 564,588.85

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.