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Finding the Fourth Proportional to 61,210.28, 91,815.44 and 19,686.44

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Solution

The fourth proportional to 61,210.28, 91,815.44 and 19,686.44 is: 29,529.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,210.28 : 91,815.44 = 19,686.44 : x
  2. Step 2: Convert to fraction form
    61,210.28/91,815.44 = 19,686.44/x
  3. Step 3: Cross multiply
    61,210.28x = 91,815.44 × 19,686.44
  4. Step 4: Simplify right side
    61,210.28x = 1,807,519,150.63
  5. Step 5: Solve for x
    x = 1,807,519,150.63/61,210.28
  6. Step 6: Final answer
    x = 29,529.67

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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.