Home / 90,811.40-125,320.50-50,529.80

Finding the Fourth Proportional to 90,811.40, 125,320.50 and 50,529.80

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Solution

The fourth proportional to 90,811.40, 125,320.50 and 50,529.80 is: 69,731.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,811.40 : 125,320.50 = 50,529.80 : x
  2. Step 2: Convert to fraction form
    90,811.40/125,320.50 = 50,529.80/x
  3. Step 3: Cross multiply
    90,811.40x = 125,320.50 × 50,529.80
  4. Step 4: Simplify right side
    90,811.40x = 6,332,419,800.90
  5. Step 5: Solve for x
    x = 6,332,419,800.90/90,811.40
  6. Step 6: Final answer
    x = 69,731.55

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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.