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Finding the Fourth Proportional to 66,647,453.48, 99,980,743.42 and 20,593,343.82

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Solution

The fourth proportional to 66,647,453.48, 99,980,743.42 and 20,593,343.82 is: 30,892,970.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647,453.48 : 99,980,743.42 = 20,593,343.82 : x
  2. Step 2: Convert to fraction form
    66,647,453.48/99,980,743.42 = 20,593,343.82/x
  3. Step 3: Cross multiply
    66,647,453.48x = 99,980,743.42 × 20,593,343.82
  4. Step 4: Simplify right side
    66,647,453.48x = 2,058,937,824,627,262.75
  5. Step 5: Solve for x
    x = 2,058,937,824,627,262.75/66,647,453.48
  6. Step 6: Final answer
    x = 30,892,970.66

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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.