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Finding the Fourth Proportional to 117,561.86, 162,302.61 and 77,392.39

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Solution

The fourth proportional to 117,561.86, 162,302.61 and 77,392.39 is: 106,845.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,561.86 : 162,302.61 = 77,392.39 : x
  2. Step 2: Convert to fraction form
    117,561.86/162,302.61 = 77,392.39/x
  3. Step 3: Cross multiply
    117,561.86x = 162,302.61 × 77,392.39
  4. Step 4: Simplify right side
    117,561.86x = 12,560,986,485.38
  5. Step 5: Solve for x
    x = 12,560,986,485.38/117,561.86
  6. Step 6: Final answer
    x = 106,845.76

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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.