Home / 100,860.20-139,181.57-55,529.58

Finding the Fourth Proportional to 100,860.20, 139,181.57 and 55,529.58

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Solution

The fourth proportional to 100,860.20, 139,181.57 and 55,529.58 is: 76,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,860.20 : 139,181.57 = 55,529.58 : x
  2. Step 2: Convert to fraction form
    100,860.20/139,181.57 = 55,529.58/x
  3. Step 3: Cross multiply
    100,860.20x = 139,181.57 × 55,529.58
  4. Step 4: Simplify right side
    100,860.20x = 7,728,694,125.84
  5. Step 5: Solve for x
    x = 7,728,694,125.84/100,860.20
  6. Step 6: Final answer
    x = 76,627.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.