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Finding the Third Proportional to 86,291,780 and 185,390,629

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Solution

The third proportional to 86,291,780 and 185,390,629 is: 398,296,168.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,291,780 : 185,390,629 = 185,390,629 : x
  2. Step 2: Convert to fraction form
    86,291,780/185,390,629 = 185,390,629/x
  3. Step 3: Cross multiply
    86,291,780x = 185,390,629 × 185,390,629
  4. Step 4: Simplify right side
    86,291,780x = 34,369,685,321,015,640
  5. Step 5: Solve for x
    x = 34,369,685,321,015,640/86,291,780
  6. Step 6: Final answer
    x = 398,296,168.20

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.