Home / 201,979.49-278,747.75-111,351.65

Finding the Fourth Proportional to 201,979.49, 278,747.75 and 111,351.65

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Solution

The fourth proportional to 201,979.49, 278,747.75 and 111,351.65 is: 153,674.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,979.49 : 278,747.75 = 111,351.65 : x
  2. Step 2: Convert to fraction form
    201,979.49/278,747.75 = 111,351.65/x
  3. Step 3: Cross multiply
    201,979.49x = 278,747.75 × 111,351.65
  4. Step 4: Simplify right side
    201,979.49x = 31,039,020,780.93
  5. Step 5: Solve for x
    x = 31,039,020,780.93/201,979.49
  6. Step 6: Final answer
    x = 153,674.13

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1.5x scale

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.