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Finding the Fourth Proportional to 70,743.68, 106,536.80 and 61,619.84

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Solution

The fourth proportional to 70,743.68, 106,536.80 and 61,619.84 is: 92,796.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,743.68 : 106,536.80 = 61,619.84 : x
  2. Step 2: Convert to fraction form
    70,743.68/106,536.80 = 61,619.84/x
  3. Step 3: Cross multiply
    70,743.68x = 106,536.80 × 61,619.84
  4. Step 4: Simplify right side
    70,743.68x = 6,564,780,570.11
  5. Step 5: Solve for x
    x = 6,564,780,570.11/70,743.68
  6. Step 6: Final answer
    x = 92,796.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.