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Finding the Fourth Proportional to 118,090.96, 162,968.56 and 72,798.86

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Solution

The fourth proportional to 118,090.96, 162,968.56 and 72,798.86 is: 100,464.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,090.96 : 162,968.56 = 72,798.86 : x
  2. Step 2: Convert to fraction form
    118,090.96/162,968.56 = 72,798.86/x
  3. Step 3: Cross multiply
    118,090.96x = 162,968.56 × 72,798.86
  4. Step 4: Simplify right side
    118,090.96x = 11,863,925,383.84
  5. Step 5: Solve for x
    x = 11,863,925,383.84/118,090.96
  6. Step 6: Final answer
    x = 100,464.30

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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.