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Finding the Third Proportional to 139,440.50 and 209,478.75

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Solution

The third proportional to 139,440.50 and 209,478.75 is: 314,695.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,440.50 : 209,478.75 = 209,478.75 : x
  2. Step 2: Convert to fraction form
    139,440.50/209,478.75 = 209,478.75/x
  3. Step 3: Cross multiply
    139,440.50x = 209,478.75 × 209,478.75
  4. Step 4: Simplify right side
    139,440.50x = 43,881,346,701.56
  5. Step 5: Solve for x
    x = 43,881,346,701.56/139,440.50
  6. Step 6: Final answer
    x = 314,695.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.