Home / 100,106.85-138,145.61-54,783.92

Finding the Fourth Proportional to 100,106.85, 138,145.61 and 54,783.92

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Solution

The fourth proportional to 100,106.85, 138,145.61 and 54,783.92 is: 75,600.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,106.85 : 138,145.61 = 54,783.92 : x
  2. Step 2: Convert to fraction form
    100,106.85/138,145.61 = 54,783.92/x
  3. Step 3: Cross multiply
    100,106.85x = 138,145.61 × 54,783.92
  4. Step 4: Simplify right side
    100,106.85x = 7,568,157,599.99
  5. Step 5: Solve for x
    x = 7,568,157,599.99/100,106.85
  6. Step 6: Final answer
    x = 75,600.80

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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.