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Finding the Third Proportional to 39,921,272 and 86,618,438

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Solution

The third proportional to 39,921,272 and 86,618,438 is: 187,938,746.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,921,272 : 86,618,438 = 86,618,438 : x
  2. Step 2: Convert to fraction form
    39,921,272/86,618,438 = 86,618,438/x
  3. Step 3: Cross multiply
    39,921,272x = 86,618,438 × 86,618,438
  4. Step 4: Simplify right side
    39,921,272x = 7,502,753,801,559,844
  5. Step 5: Solve for x
    x = 7,502,753,801,559,844/39,921,272
  6. Step 6: Final answer
    x = 187,938,746.08

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.