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Finding the Third Proportional to 121,638,690 and 251,900,538

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Solution

The third proportional to 121,638,690 and 251,900,538 is: 521,658,701.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,638,690 : 251,900,538 = 251,900,538 : x
  2. Step 2: Convert to fraction form
    121,638,690/251,900,538 = 251,900,538/x
  3. Step 3: Cross multiply
    121,638,690x = 251,900,538 × 251,900,538
  4. Step 4: Simplify right side
    121,638,690x = 63,453,881,044,689,440
  5. Step 5: Solve for x
    x = 63,453,881,044,689,440/121,638,690
  6. Step 6: Final answer
    x = 521,658,701.23

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.