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Finding the Fourth Proportional to 65,892,738.78, 98,883,761.68 and 27,038,215.20

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Solution

The fourth proportional to 65,892,738.78, 98,883,761.68 and 27,038,215.20 is: 40,575,645.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,892,738.78 : 98,883,761.68 = 27,038,215.20 : x
  2. Step 2: Convert to fraction form
    65,892,738.78/98,883,761.68 = 27,038,215.20/x
  3. Step 3: Cross multiply
    65,892,738.78x = 98,883,761.68 × 27,038,215.20
  4. Step 4: Simplify right side
    65,892,738.78x = 2,673,640,428,089,353.50
  5. Step 5: Solve for x
    x = 2,673,640,428,089,353.50/65,892,738.78
  6. Step 6: Final answer
    x = 40,575,645.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.