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Finding the Fourth Proportional to 255,709.17, 383,563.49 and 68,720.67

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Solution

The fourth proportional to 255,709.17, 383,563.49 and 68,720.67 is: 103,080.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,709.17 : 383,563.49 = 68,720.67 : x
  2. Step 2: Convert to fraction form
    255,709.17/383,563.49 = 68,720.67/x
  3. Step 3: Cross multiply
    255,709.17x = 383,563.49 × 68,720.67
  4. Step 4: Simplify right side
    255,709.17x = 26,358,739,676.73
  5. Step 5: Solve for x
    x = 26,358,739,676.73/255,709.17
  6. Step 6: Final answer
    x = 103,080.93

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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.