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Finding the Third Proportional to 78,210,867 and 106,509,851

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Solution

The third proportional to 78,210,867 and 106,509,851 is: 145,048,236.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,210,867 : 106,509,851 = 106,509,851 : x
  2. Step 2: Convert to fraction form
    78,210,867/106,509,851 = 106,509,851/x
  3. Step 3: Cross multiply
    78,210,867x = 106,509,851 × 106,509,851
  4. Step 4: Simplify right side
    78,210,867x = 11,344,348,360,042,200
  5. Step 5: Solve for x
    x = 11,344,348,360,042,200/78,210,867
  6. Step 6: Final answer
    x = 145,048,236.84

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.