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Finding the Third Proportional to 78,631,135 and 123,080,276

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Solution

The third proportional to 78,631,135 and 123,080,276 is: 192,655,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631,135 : 123,080,276 = 123,080,276 : x
  2. Step 2: Convert to fraction form
    78,631,135/123,080,276 = 123,080,276/x
  3. Step 3: Cross multiply
    78,631,135x = 123,080,276 × 123,080,276
  4. Step 4: Simplify right side
    78,631,135x = 15,148,754,340,236,176
  5. Step 5: Solve for x
    x = 15,148,754,340,236,176/78,631,135
  6. Step 6: Final answer
    x = 192,655,928.73

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.