Home / 85,343,471.32-128,015,539.11-20,647,172.56

Finding the Fourth Proportional to 85,343,471.32, 128,015,539.11 and 20,647,172.56

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Solution

The fourth proportional to 85,343,471.32, 128,015,539.11 and 20,647,172.56 is: 30,970,839.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,471.32 : 128,015,539.11 = 20,647,172.56 : x
  2. Step 2: Convert to fraction form
    85,343,471.32/128,015,539.11 = 20,647,172.56/x
  3. Step 3: Cross multiply
    85,343,471.32x = 128,015,539.11 × 20,647,172.56
  4. Step 4: Simplify right side
    85,343,471.32x = 2,643,158,926,365,598.50
  5. Step 5: Solve for x
    x = 2,643,158,926,365,598.50/85,343,471.32
  6. Step 6: Final answer
    x = 30,970,839.19

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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.