Home / 255,715.35-383,559.21-78,222.38

Finding the Fourth Proportional to 255,715.35, 383,559.21 and 78,222.38

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Solution

The fourth proportional to 255,715.35, 383,559.21 and 78,222.38 is: 117,329.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,715.35 : 383,559.21 = 78,222.38 : x
  2. Step 2: Convert to fraction form
    255,715.35/383,559.21 = 78,222.38/x
  3. Step 3: Cross multiply
    255,715.35x = 383,559.21 × 78,222.38
  4. Step 4: Simplify right side
    255,715.35x = 30,002,912,359.32
  5. Step 5: Solve for x
    x = 30,002,912,359.32/255,715.35
  6. Step 6: Final answer
    x = 117,329.34

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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.