Home / 85,589.36-128,396.34-26,429.60

Finding the Fourth Proportional to 85,589.36, 128,396.34 and 26,429.60

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Solution

The fourth proportional to 85,589.36, 128,396.34 and 26,429.60 is: 39,648.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,589.36 : 128,396.34 = 26,429.60 : x
  2. Step 2: Convert to fraction form
    85,589.36/128,396.34 = 26,429.60/x
  3. Step 3: Cross multiply
    85,589.36x = 128,396.34 × 26,429.60
  4. Step 4: Simplify right side
    85,589.36x = 3,393,463,907.66
  5. Step 5: Solve for x
    x = 3,393,463,907.66/85,589.36
  6. Step 6: Final answer
    x = 39,648.20

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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.