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Finding the Fourth Proportional to 205,169.95, 307,788.95 and 72,015.67

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Solution

The fourth proportional to 205,169.95, 307,788.95 and 72,015.67 is: 108,035.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,169.95 : 307,788.95 = 72,015.67 : x
  2. Step 2: Convert to fraction form
    205,169.95/307,788.95 = 72,015.67/x
  3. Step 3: Cross multiply
    205,169.95x = 307,788.95 × 72,015.67
  4. Step 4: Simplify right side
    205,169.95x = 22,165,627,452.85
  5. Step 5: Solve for x
    x = 22,165,627,452.85/205,169.95
  6. Step 6: Final answer
    x = 108,035.45

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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.