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Finding the Third Proportional to 121,638,689 and 251,900,536

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Solution

The third proportional to 121,638,689 and 251,900,536 is: 521,658,697.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,638,689 : 251,900,536 = 251,900,536 : x
  2. Step 2: Convert to fraction form
    121,638,689/251,900,536 = 251,900,536/x
  3. Step 3: Cross multiply
    121,638,689x = 251,900,536 × 251,900,536
  4. Step 4: Simplify right side
    121,638,689x = 63,453,880,037,087,296
  5. Step 5: Solve for x
    x = 63,453,880,037,087,296/121,638,689
  6. Step 6: Final answer
    x = 521,658,697.23

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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.