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Finding the Fourth Proportional to 118,811.94, 163,960.43 and 71,076.50

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Solution

The fourth proportional to 118,811.94, 163,960.43 and 71,076.50 is: 98,085.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,811.94 : 163,960.43 = 71,076.50 : x
  2. Step 2: Convert to fraction form
    118,811.94/163,960.43 = 71,076.50/x
  3. Step 3: Cross multiply
    118,811.94x = 163,960.43 × 71,076.50
  4. Step 4: Simplify right side
    118,811.94x = 11,653,733,502.90
  5. Step 5: Solve for x
    x = 11,653,733,502.90/118,811.94
  6. Step 6: Final answer
    x = 98,085.54

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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.