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Finding the Fourth Proportional to 83,648.90, 125,362.60 and 61,357.90

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Solution

The fourth proportional to 83,648.90, 125,362.60 and 61,357.90 is: 91,955.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,648.90 : 125,362.60 = 61,357.90 : x
  2. Step 2: Convert to fraction form
    83,648.90/125,362.60 = 61,357.90/x
  3. Step 3: Cross multiply
    83,648.90x = 125,362.60 × 61,357.90
  4. Step 4: Simplify right side
    83,648.90x = 7,691,985,567.75
  5. Step 5: Solve for x
    x = 7,691,985,567.75/83,648.90
  6. Step 6: Final answer
    x = 91,955.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.