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Finding the Fourth Proportional to 201,804.85, 278,490.70 and 111,160.54

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Solution

The fourth proportional to 201,804.85, 278,490.70 and 111,160.54 is: 153,401.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,804.85 : 278,490.70 = 111,160.54 : x
  2. Step 2: Convert to fraction form
    201,804.85/278,490.70 = 111,160.54/x
  3. Step 3: Cross multiply
    201,804.85x = 278,490.70 × 111,160.54
  4. Step 4: Simplify right side
    201,804.85x = 30,957,176,596.98
  5. Step 5: Solve for x
    x = 30,957,176,596.98/201,804.85
  6. Step 6: Final answer
    x = 153,401.55

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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.