Home / 85,438,655.54-128,158,786.83-20,743,028.90

Finding the Fourth Proportional to 85,438,655.54, 128,158,786.83 and 20,743,028.90

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Solution

The fourth proportional to 85,438,655.54, 128,158,786.83 and 20,743,028.90 is: 31,114,738.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,438,655.54 : 128,158,786.83 = 20,743,028.90 : x
  2. Step 2: Convert to fraction form
    85,438,655.54/128,158,786.83 = 20,743,028.90/x
  3. Step 3: Cross multiply
    85,438,655.54x = 128,158,786.83 × 20,743,028.90
  4. Step 4: Simplify right side
    85,438,655.54x = 2,658,401,419,003,629
  5. Step 5: Solve for x
    x = 2,658,401,419,003,629/85,438,655.54
  6. Step 6: Final answer
    x = 31,114,738.43

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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.