Home / 85,343,470.32-128,015,537.61-20,647,171.56

Finding the Fourth Proportional to 85,343,470.32, 128,015,537.61 and 20,647,171.56

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Solution

The fourth proportional to 85,343,470.32, 128,015,537.61 and 20,647,171.56 is: 30,970,837.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,470.32 : 128,015,537.61 = 20,647,171.56 : x
  2. Step 2: Convert to fraction form
    85,343,470.32/128,015,537.61 = 20,647,171.56/x
  3. Step 3: Cross multiply
    85,343,470.32x = 128,015,537.61 × 20,647,171.56
  4. Step 4: Simplify right side
    85,343,470.32x = 2,643,158,767,379,302
  5. Step 5: Solve for x
    x = 2,643,158,767,379,302/85,343,470.32
  6. Step 6: Final answer
    x = 30,970,837.69

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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.