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Finding the Fourth Proportional to 201,909.45, 278,636.91 and 111,268.67

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Solution

The fourth proportional to 201,909.45, 278,636.91 and 111,268.67 is: 153,551.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,909.45 : 278,636.91 = 111,268.67 : x
  2. Step 2: Convert to fraction form
    201,909.45/278,636.91 = 111,268.67/x
  3. Step 3: Cross multiply
    201,909.45x = 278,636.91 × 111,268.67
  4. Step 4: Simplify right side
    201,909.45x = 31,003,558,457.57
  5. Step 5: Solve for x
    x = 31,003,558,457.57/201,909.45
  6. Step 6: Final answer
    x = 153,551.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.