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Finding the Fourth Proportional to 170,638.85, 255,851.66 and 75,865.21

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Solution

The fourth proportional to 170,638.85, 255,851.66 and 75,865.21 is: 113,750.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,638.85 : 255,851.66 = 75,865.21 : x
  2. Step 2: Convert to fraction form
    170,638.85/255,851.66 = 75,865.21/x
  3. Step 3: Cross multiply
    170,638.85x = 255,851.66 × 75,865.21
  4. Step 4: Simplify right side
    170,638.85x = 19,410,239,464.78
  5. Step 5: Solve for x
    x = 19,410,239,464.78/170,638.85
  6. Step 6: Final answer
    x = 113,750.41

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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.