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Finding the Third Proportional to 99,638,478 and 215,653,158

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Solution

The third proportional to 99,638,478 and 215,653,158 is: 466,750,250.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,638,478 : 215,653,158 = 215,653,158 : x
  2. Step 2: Convert to fraction form
    99,638,478/215,653,158 = 215,653,158/x
  3. Step 3: Cross multiply
    99,638,478x = 215,653,158 × 215,653,158
  4. Step 4: Simplify right side
    99,638,478x = 46,506,284,555,372,960
  5. Step 5: Solve for x
    x = 46,506,284,555,372,960/99,638,478
  6. Step 6: Final answer
    x = 466,750,250.39

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.