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Finding the Fourth Proportional to 419,871,806.55, 629,765,186.45 and 113,194,920.15

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Solution

The fourth proportional to 419,871,806.55, 629,765,186.45 and 113,194,920.15 is: 169,780,916.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,871,806.55 : 629,765,186.45 = 113,194,920.15 : x
  2. Step 2: Convert to fraction form
    419,871,806.55/629,765,186.45 = 113,194,920.15/x
  3. Step 3: Cross multiply
    419,871,806.55x = 629,765,186.45 × 113,194,920.15
  4. Step 4: Simplify right side
    419,871,806.55x = 71,286,219,992,891,648
  5. Step 5: Solve for x
    x = 71,286,219,992,891,648/419,871,806.55
  6. Step 6: Final answer
    x = 169,780,916.18

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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.