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Finding the Fourth Proportional to 68,078.51, 93,934.44 and 39,778.73

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Solution

The fourth proportional to 68,078.51, 93,934.44 and 39,778.73 is: 54,886.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,078.51 : 93,934.44 = 39,778.73 : x
  2. Step 2: Convert to fraction form
    68,078.51/93,934.44 = 39,778.73/x
  3. Step 3: Cross multiply
    68,078.51x = 93,934.44 × 39,778.73
  4. Step 4: Simplify right side
    68,078.51x = 3,736,592,726.46
  5. Step 5: Solve for x
    x = 3,736,592,726.46/68,078.51
  6. Step 6: Final answer
    x = 54,886.52

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1.5x scale

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.