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Finding the Fourth Proportional to 118,357.50, 163,338.21 and 68,056.50

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Solution

The fourth proportional to 118,357.50, 163,338.21 and 68,056.50 is: 93,920.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,357.50 : 163,338.21 = 68,056.50 : x
  2. Step 2: Convert to fraction form
    118,357.50/163,338.21 = 68,056.50/x
  3. Step 3: Cross multiply
    118,357.50x = 163,338.21 × 68,056.50
  4. Step 4: Simplify right side
    118,357.50x = 11,116,226,888.87
  5. Step 5: Solve for x
    x = 11,116,226,888.87/118,357.50
  6. Step 6: Final answer
    x = 93,920.76

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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.