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Finding the Third Proportional to 86,715,890 and 127,678,280

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Solution

The third proportional to 86,715,890 and 127,678,280 is: 187,990,265.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,715,890 : 127,678,280 = 127,678,280 : x
  2. Step 2: Convert to fraction form
    86,715,890/127,678,280 = 127,678,280/x
  3. Step 3: Cross multiply
    86,715,890x = 127,678,280 × 127,678,280
  4. Step 4: Simplify right side
    86,715,890x = 16,301,743,183,758,400
  5. Step 5: Solve for x
    x = 16,301,743,183,758,400/86,715,890
  6. Step 6: Final answer
    x = 187,990,265.50

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.