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Finding the Fourth Proportional to 61,912.76, 92,840.78 and 19,784.66

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Solution

The fourth proportional to 61,912.76, 92,840.78 and 19,784.66 is: 29,667.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,912.76 : 92,840.78 = 19,784.66 : x
  2. Step 2: Convert to fraction form
    61,912.76/92,840.78 = 19,784.66/x
  3. Step 3: Cross multiply
    61,912.76x = 92,840.78 × 19,784.66
  4. Step 4: Simplify right side
    61,912.76x = 1,836,822,851.69
  5. Step 5: Solve for x
    x = 1,836,822,851.69/61,912.76
  6. Step 6: Final answer
    x = 29,667.92

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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.