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Finding the Fourth Proportional to 170,806.51, 256,231.64 and 65,611.81

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Solution

The fourth proportional to 170,806.51, 256,231.64 and 65,611.81 is: 98,426.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,806.51 : 256,231.64 = 65,611.81 : x
  2. Step 2: Convert to fraction form
    170,806.51/256,231.64 = 65,611.81/x
  3. Step 3: Cross multiply
    170,806.51x = 256,231.64 × 65,611.81
  4. Step 4: Simplify right side
    170,806.51x = 16,811,821,679.67
  5. Step 5: Solve for x
    x = 16,811,821,679.67/170,806.51
  6. Step 6: Final answer
    x = 98,426.12

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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.