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Finding the Fourth Proportional to 201,718.65, 278,360.72 and 111,057.40

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Solution

The fourth proportional to 201,718.65, 278,360.72 and 111,057.40 is: 153,253.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,718.65 : 278,360.72 = 111,057.40 : x
  2. Step 2: Convert to fraction form
    201,718.65/278,360.72 = 111,057.40/x
  3. Step 3: Cross multiply
    201,718.65x = 278,360.72 × 111,057.40
  4. Step 4: Simplify right side
    201,718.65x = 30,914,017,547.68
  5. Step 5: Solve for x
    x = 30,914,017,547.68/201,718.65
  6. Step 6: Final answer
    x = 153,253.15

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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.