Home / 255,921.21-383,937.97-78,441.57

Finding the Fourth Proportional to 255,921.21, 383,937.97 and 78,441.57

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Solution

The fourth proportional to 255,921.21, 383,937.97 and 78,441.57 is: 117,679.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,921.21 : 383,937.97 = 78,441.57 : x
  2. Step 2: Convert to fraction form
    255,921.21/383,937.97 = 78,441.57/x
  3. Step 3: Cross multiply
    255,921.21x = 383,937.97 × 78,441.57
  4. Step 4: Simplify right side
    255,921.21x = 30,116,697,149.41
  5. Step 5: Solve for x
    x = 30,116,697,149.41/255,921.21
  6. Step 6: Final answer
    x = 117,679.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.