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Finding the Third Proportional to 66,709.50 and 145,731

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Solution

The third proportional to 66,709.50 and 145,731 is: 318,358.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,709.50 : 145,731 = 145,731 : x
  2. Step 2: Convert to fraction form
    66,709.50/145,731 = 145,731/x
  3. Step 3: Cross multiply
    66,709.50x = 145,731 × 145,731
  4. Step 4: Simplify right side
    66,709.50x = 21,237,524,361
  5. Step 5: Solve for x
    x = 21,237,524,361/66,709.50
  6. Step 6: Final answer
    x = 318,358.32

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.