Home / 100,106.87-138,145.64-54,783.95

Finding the Fourth Proportional to 100,106.87, 138,145.64 and 54,783.95

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Solution

The fourth proportional to 100,106.87, 138,145.64 and 54,783.95 is: 75,600.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,106.87 : 138,145.64 = 54,783.95 : x
  2. Step 2: Convert to fraction form
    100,106.87/138,145.64 = 54,783.95/x
  3. Step 3: Cross multiply
    100,106.87x = 138,145.64 × 54,783.95
  4. Step 4: Simplify right side
    100,106.87x = 7,568,162,927.61
  5. Step 5: Solve for x
    x = 7,568,162,927.61/100,106.87
  6. Step 6: Final answer
    x = 75,600.83

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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.