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Finding the Fourth Proportional to 86,231.90, 118,999.58 and 48,506.42

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Solution

The fourth proportional to 86,231.90, 118,999.58 and 48,506.42 is: 66,938.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231.90 : 118,999.58 = 48,506.42 : x
  2. Step 2: Convert to fraction form
    86,231.90/118,999.58 = 48,506.42/x
  3. Step 3: Cross multiply
    86,231.90x = 118,999.58 × 48,506.42
  4. Step 4: Simplify right side
    86,231.90x = 5,772,243,607.30
  5. Step 5: Solve for x
    x = 5,772,243,607.30/86,231.90
  6. Step 6: Final answer
    x = 66,938.61

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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.