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Finding the Fourth Proportional to 77,617.82, 116,508.15 and 68,789.63

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Solution

The fourth proportional to 77,617.82, 116,508.15 and 68,789.63 is: 103,256.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,617.82 : 116,508.15 = 68,789.63 : x
  2. Step 2: Convert to fraction form
    77,617.82/116,508.15 = 68,789.63/x
  3. Step 3: Cross multiply
    77,617.82x = 116,508.15 × 68,789.63
  4. Step 4: Simplify right side
    77,617.82x = 8,014,552,530.48
  5. Step 5: Solve for x
    x = 8,014,552,530.48/77,617.82
  6. Step 6: Final answer
    x = 103,256.60

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1.5x scale

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.