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Finding the Third Proportional to 51,472 and 79,648

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Solution

The third proportional to 51,472 and 79,648 is: 123,247.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,472 : 79,648 = 79,648 : x
  2. Step 2: Convert to fraction form
    51,472/79,648 = 79,648/x
  3. Step 3: Cross multiply
    51,472x = 79,648 × 79,648
  4. Step 4: Simplify right side
    51,472x = 6,343,803,904
  5. Step 5: Solve for x
    x = 6,343,803,904/51,472
  6. Step 6: Final answer
    x = 123,247.67

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.