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Finding the Third Proportional to 78,640,422 and 117,960,643

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Solution

The third proportional to 78,640,422 and 117,960,643 is: 176,940,979.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,640,422 : 117,960,643 = 117,960,643 : x
  2. Step 2: Convert to fraction form
    78,640,422/117,960,643 = 117,960,643/x
  3. Step 3: Cross multiply
    78,640,422x = 117,960,643 × 117,960,643
  4. Step 4: Simplify right side
    78,640,422x = 13,914,713,296,973,448
  5. Step 5: Solve for x
    x = 13,914,713,296,973,448/78,640,422
  6. Step 6: Final answer
    x = 176,940,979.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.