Home / 91,103.05-125,722.41-50,815.78

Finding the Fourth Proportional to 91,103.05, 125,722.41 and 50,815.78

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Solution

The fourth proportional to 91,103.05, 125,722.41 and 50,815.78 is: 70,125.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,103.05 : 125,722.41 = 50,815.78 : x
  2. Step 2: Convert to fraction form
    91,103.05/125,722.41 = 50,815.78/x
  3. Step 3: Cross multiply
    91,103.05x = 125,722.41 × 50,815.78
  4. Step 4: Simplify right side
    91,103.05x = 6,388,682,327.63
  5. Step 5: Solve for x
    x = 6,388,682,327.63/91,103.05
  6. Step 6: Final answer
    x = 70,125.89

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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.