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Finding the Fourth Proportional to 154,923.75, 213,794.78 and 87,855.75

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Solution

The fourth proportional to 154,923.75, 213,794.78 and 87,855.75 is: 121,240.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,923.75 : 213,794.78 = 87,855.75 : x
  2. Step 2: Convert to fraction form
    154,923.75/213,794.78 = 87,855.75/x
  3. Step 3: Cross multiply
    154,923.75x = 213,794.78 × 87,855.75
  4. Step 4: Simplify right side
    154,923.75x = 18,783,100,303.71
  5. Step 5: Solve for x
    x = 18,783,100,303.71/154,923.75
  6. Step 6: Final answer
    x = 121,240.94

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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.