Home / 100,155.93-138,215.22-54,836.85

Finding the Fourth Proportional to 100,155.93, 138,215.22 and 54,836.85

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Solution

The fourth proportional to 100,155.93, 138,215.22 and 54,836.85 is: 75,674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,155.93 : 138,215.22 = 54,836.85 : x
  2. Step 2: Convert to fraction form
    100,155.93/138,215.22 = 54,836.85/x
  3. Step 3: Cross multiply
    100,155.93x = 138,215.22 × 54,836.85
  4. Step 4: Simplify right side
    100,155.93x = 7,579,287,286.86
  5. Step 5: Solve for x
    x = 7,579,287,286.86/100,155.93
  6. Step 6: Final answer
    x = 75,674.87

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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.