Home / 255,944.12-383,989.92-78,477.28

Finding the Fourth Proportional to 255,944.12, 383,989.92 and 78,477.28

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Solution

The fourth proportional to 255,944.12, 383,989.92 and 78,477.28 is: 117,738.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,944.12 : 383,989.92 = 78,477.28 : x
  2. Step 2: Convert to fraction form
    255,944.12/383,989.92 = 78,477.28/x
  3. Step 3: Cross multiply
    255,944.12x = 383,989.92 × 78,477.28
  4. Step 4: Simplify right side
    255,944.12x = 30,134,484,469.02
  5. Step 5: Solve for x
    x = 30,134,484,469.02/255,944.12
  6. Step 6: Final answer
    x = 117,738.53

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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.