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Finding the Third Proportional to 139,507,478.50 and 217,738,029.50

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Solution

The third proportional to 139,507,478.50 and 217,738,029.50 is: 339,837,333.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,507,478.50 : 217,738,029.50 = 217,738,029.50 : x
  2. Step 2: Convert to fraction form
    139,507,478.50/217,738,029.50 = 217,738,029.50/x
  3. Step 3: Cross multiply
    139,507,478.50x = 217,738,029.50 × 217,738,029.50
  4. Step 4: Simplify right side
    139,507,478.50x = 47,409,849,490,542,872
  5. Step 5: Solve for x
    x = 47,409,849,490,542,872/139,507,478.50
  6. Step 6: Final answer
    x = 339,837,333.46

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.