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Finding the Fourth Proportional to 170,716.40, 256,074.60 and 81,924.20

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Solution

The fourth proportional to 170,716.40, 256,074.60 and 81,924.20 is: 122,886.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,716.40 : 256,074.60 = 81,924.20 : x
  2. Step 2: Convert to fraction form
    170,716.40/256,074.60 = 81,924.20/x
  3. Step 3: Cross multiply
    170,716.40x = 256,074.60 × 81,924.20
  4. Step 4: Simplify right side
    170,716.40x = 20,978,706,745.32
  5. Step 5: Solve for x
    x = 20,978,706,745.32/170,716.40
  6. Step 6: Final answer
    x = 122,886.30

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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.