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Finding the Fourth Proportional to 65,666,081.92, 90,619,003.20 and 36,692,728.96

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Solution

The fourth proportional to 65,666,081.92, 90,619,003.20 and 36,692,728.96 is: 50,635,859.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,666,081.92 : 90,619,003.20 = 36,692,728.96 : x
  2. Step 2: Convert to fraction form
    65,666,081.92/90,619,003.20 = 36,692,728.96/x
  3. Step 3: Cross multiply
    65,666,081.92x = 90,619,003.20 × 36,692,728.96
  4. Step 4: Simplify right side
    65,666,081.92x = 3,325,058,523,042,973
  5. Step 5: Solve for x
    x = 3,325,058,523,042,973/65,666,081.92
  6. Step 6: Final answer
    x = 50,635,859.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.