Home / 81,144.48-121,716.96-28,525.44

Finding the Fourth Proportional to 81,144.48, 121,716.96 and 28,525.44

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Solution

The fourth proportional to 81,144.48, 121,716.96 and 28,525.44 is: 42,788.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144.48 : 121,716.96 = 28,525.44 : x
  2. Step 2: Convert to fraction form
    81,144.48/121,716.96 = 28,525.44/x
  3. Step 3: Cross multiply
    81,144.48x = 121,716.96 × 28,525.44
  4. Step 4: Simplify right side
    81,144.48x = 3,472,029,839.46
  5. Step 5: Solve for x
    x = 3,472,029,839.46/81,144.48
  6. Step 6: Final answer
    x = 42,788.24

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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.