Home / 85,343,464.31-128,015,528.58-20,647,165.56

Finding the Fourth Proportional to 85,343,464.31, 128,015,528.58 and 20,647,165.56

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Solution

The fourth proportional to 85,343,464.31, 128,015,528.58 and 20,647,165.56 is: 30,970,828.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,464.31 : 128,015,528.58 = 20,647,165.56 : x
  2. Step 2: Convert to fraction form
    85,343,464.31/128,015,528.58 = 20,647,165.56/x
  3. Step 3: Cross multiply
    85,343,464.31x = 128,015,528.58 × 20,647,165.56
  4. Step 4: Simplify right side
    85,343,464.31x = 2,643,157,812,842,171.50
  5. Step 5: Solve for x
    x = 2,643,157,812,842,171.50/85,343,464.31
  6. Step 6: Final answer
    x = 30,970,828.69

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1.5x scale

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.