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Finding the Fourth Proportional to 65,868.94, 98,806.14 and 19,121.81

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Solution

The fourth proportional to 65,868.94, 98,806.14 and 19,121.81 is: 28,683.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,868.94 : 98,806.14 = 19,121.81 : x
  2. Step 2: Convert to fraction form
    65,868.94/98,806.14 = 19,121.81/x
  3. Step 3: Cross multiply
    65,868.94x = 98,806.14 × 19,121.81
  4. Step 4: Simplify right side
    65,868.94x = 1,889,352,482.93
  5. Step 5: Solve for x
    x = 1,889,352,482.93/65,868.94
  6. Step 6: Final answer
    x = 28,683.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.