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Finding the Third Proportional to 51,988.75 and 78,717

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Solution

The third proportional to 51,988.75 and 78,717 is: 119,186.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,988.75 : 78,717 = 78,717 : x
  2. Step 2: Convert to fraction form
    51,988.75/78,717 = 78,717/x
  3. Step 3: Cross multiply
    51,988.75x = 78,717 × 78,717
  4. Step 4: Simplify right side
    51,988.75x = 6,196,366,089
  5. Step 5: Solve for x
    x = 6,196,366,089/51,988.75
  6. Step 6: Final answer
    x = 119,186.67

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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.