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Finding the Fourth Proportional to 107,790.60, 161,297.10 and 72,798.60

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Solution

The fourth proportional to 107,790.60, 161,297.10 and 72,798.60 is: 108,935.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,790.60 : 161,297.10 = 72,798.60 : x
  2. Step 2: Convert to fraction form
    107,790.60/161,297.10 = 72,798.60/x
  3. Step 3: Cross multiply
    107,790.60x = 161,297.10 × 72,798.60
  4. Step 4: Simplify right side
    107,790.60x = 11,742,203,064.06
  5. Step 5: Solve for x
    x = 11,742,203,064.06/107,790.60
  6. Step 6: Final answer
    x = 108,935.32

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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.