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Finding the Third Proportional to 31,511 and 48,815.75

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Solution

The third proportional to 31,511 and 48,815.75 is: 75,623.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,511 : 48,815.75 = 48,815.75 : x
  2. Step 2: Convert to fraction form
    31,511/48,815.75 = 48,815.75/x
  3. Step 3: Cross multiply
    31,511x = 48,815.75 × 48,815.75
  4. Step 4: Simplify right side
    31,511x = 2,382,977,448.06
  5. Step 5: Solve for x
    x = 2,382,977,448.06/31,511
  6. Step 6: Final answer
    x = 75,623.67

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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.