Home / 201,916.20-278,640.60-111,280.56

Finding the Fourth Proportional to 201,916.20, 278,640.60 and 111,280.56

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Solution

The fourth proportional to 201,916.20, 278,640.60 and 111,280.56 is: 153,565.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,916.20 : 278,640.60 = 111,280.56 : x
  2. Step 2: Convert to fraction form
    201,916.20/278,640.60 = 111,280.56/x
  3. Step 3: Cross multiply
    201,916.20x = 278,640.60 × 111,280.56
  4. Step 4: Simplify right side
    201,916.20x = 31,007,282,006.74
  5. Step 5: Solve for x
    x = 31,007,282,006.74/201,916.20
  6. Step 6: Final answer
    x = 153,565.10

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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.