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Finding the Fourth Proportional to 61,900.76, 92,866.25 and 19,780.81

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Solution

The fourth proportional to 61,900.76, 92,866.25 and 19,780.81 is: 29,676.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,900.76 : 92,866.25 = 19,780.81 : x
  2. Step 2: Convert to fraction form
    61,900.76/92,866.25 = 19,780.81/x
  3. Step 3: Cross multiply
    61,900.76x = 92,866.25 × 19,780.81
  4. Step 4: Simplify right side
    61,900.76x = 1,836,969,352.68
  5. Step 5: Solve for x
    x = 1,836,969,352.68/61,900.76
  6. Step 6: Final answer
    x = 29,676.04

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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.