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Finding the Third Proportional to 51,740 and 79,113.75

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Solution

The third proportional to 51,740 and 79,113.75 is: 120,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,740 : 79,113.75 = 79,113.75 : x
  2. Step 2: Convert to fraction form
    51,740/79,113.75 = 79,113.75/x
  3. Step 3: Cross multiply
    51,740x = 79,113.75 × 79,113.75
  4. Step 4: Simplify right side
    51,740x = 6,258,985,439.06
  5. Step 5: Solve for x
    x = 6,258,985,439.06/51,740
  6. Step 6: Final answer
    x = 120,969.95

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.