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Finding the Fourth Proportional to 121,806.63, 182,746.80 and 86,336.46

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Solution

The fourth proportional to 121,806.63, 182,746.80 and 86,336.46 is: 129,530.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,806.63 : 182,746.80 = 86,336.46 : x
  2. Step 2: Convert to fraction form
    121,806.63/182,746.80 = 86,336.46/x
  3. Step 3: Cross multiply
    121,806.63x = 182,746.80 × 86,336.46
  4. Step 4: Simplify right side
    121,806.63x = 15,777,711,788.33
  5. Step 5: Solve for x
    x = 15,777,711,788.33/121,806.63
  6. Step 6: Final answer
    x = 129,530.81

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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.