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Finding the Third Proportional to 39,840 and 61,154

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Solution

The third proportional to 39,840 and 61,154 is: 93,870.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,840 : 61,154 = 61,154 : x
  2. Step 2: Convert to fraction form
    39,840/61,154 = 61,154/x
  3. Step 3: Cross multiply
    39,840x = 61,154 × 61,154
  4. Step 4: Simplify right side
    39,840x = 3,739,811,716
  5. Step 5: Solve for x
    x = 3,739,811,716/39,840
  6. Step 6: Final answer
    x = 93,870.78

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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.