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Finding the Third Proportional to 49,808 and 78,905

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Solution

The third proportional to 49,808 and 78,905 is: 124,999.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,808 : 78,905 = 78,905 : x
  2. Step 2: Convert to fraction form
    49,808/78,905 = 78,905/x
  3. Step 3: Cross multiply
    49,808x = 78,905 × 78,905
  4. Step 4: Simplify right side
    49,808x = 6,225,999,025
  5. Step 5: Solve for x
    x = 6,225,999,025/49,808
  6. Step 6: Final answer
    x = 124,999.98

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.