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Finding the Third Proportional to 78,663,920.75 and 123,400,479.75

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Solution

The third proportional to 78,663,920.75 and 123,400,479.75 is: 193,578,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,663,920.75 : 123,400,479.75 = 123,400,479.75 : x
  2. Step 2: Convert to fraction form
    78,663,920.75/123,400,479.75 = 123,400,479.75/x
  3. Step 3: Cross multiply
    78,663,920.75x = 123,400,479.75 × 123,400,479.75
  4. Step 4: Simplify right side
    78,663,920.75x = 15,227,678,402,530,160
  5. Step 5: Solve for x
    x = 15,227,678,402,530,160/78,663,920.75
  6. Step 6: Final answer
    x = 193,578,940.10

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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.