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Finding the Fourth Proportional to 77,616.82, 116,506.65 and 68,788.63

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Solution

The fourth proportional to 77,616.82, 116,506.65 and 68,788.63 is: 103,255.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,616.82 : 116,506.65 = 68,788.63 : x
  2. Step 2: Convert to fraction form
    77,616.82/116,506.65 = 68,788.63/x
  3. Step 3: Cross multiply
    77,616.82x = 116,506.65 × 68,788.63
  4. Step 4: Simplify right side
    77,616.82x = 8,014,332,256.86
  5. Step 5: Solve for x
    x = 8,014,332,256.86/77,616.82
  6. Step 6: Final answer
    x = 103,255.10

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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.