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Finding the Fourth Proportional to 61,699.80, 85,145.76 and 33,405.48

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Solution

The fourth proportional to 61,699.80, 85,145.76 and 33,405.48 is: 46,099.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,699.80 : 85,145.76 = 33,405.48 : x
  2. Step 2: Convert to fraction form
    61,699.80/85,145.76 = 33,405.48/x
  3. Step 3: Cross multiply
    61,699.80x = 85,145.76 × 33,405.48
  4. Step 4: Simplify right side
    61,699.80x = 2,844,334,982.76
  5. Step 5: Solve for x
    x = 2,844,334,982.76/61,699.80
  6. Step 6: Final answer
    x = 46,099.58

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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.