Home / 85,343,467.31-128,015,533.08-20,647,168.56

Finding the Fourth Proportional to 85,343,467.31, 128,015,533.08 and 20,647,168.56

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Solution

The fourth proportional to 85,343,467.31, 128,015,533.08 and 20,647,168.56 is: 30,970,833.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,467.31 : 128,015,533.08 = 20,647,168.56 : x
  2. Step 2: Convert to fraction form
    85,343,467.31/128,015,533.08 = 20,647,168.56/x
  3. Step 3: Cross multiply
    85,343,467.31x = 128,015,533.08 × 20,647,168.56
  4. Step 4: Simplify right side
    85,343,467.31x = 2,643,158,289,801,016
  5. Step 5: Solve for x
    x = 2,643,158,289,801,016/85,343,467.31
  6. Step 6: Final answer
    x = 30,970,833.19

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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.