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Finding the Third Proportional to 78,620,254 and 121,609,889

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Solution

The third proportional to 78,620,254 and 121,609,889 is: 188,106,300.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,620,254 : 121,609,889 = 121,609,889 : x
  2. Step 2: Convert to fraction form
    78,620,254/121,609,889 = 121,609,889/x
  3. Step 3: Cross multiply
    78,620,254x = 121,609,889 × 121,609,889
  4. Step 4: Simplify right side
    78,620,254x = 14,788,965,102,592,320
  5. Step 5: Solve for x
    x = 14,788,965,102,592,320/78,620,254
  6. Step 6: Final answer
    x = 188,106,300.22

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.