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Finding the Fourth Proportional to 39,103.66, 58,663.70 and 16,920.20

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Solution

The fourth proportional to 39,103.66, 58,663.70 and 16,920.20 is: 25,383.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,103.66 : 58,663.70 = 16,920.20 : x
  2. Step 2: Convert to fraction form
    39,103.66/58,663.70 = 16,920.20/x
  3. Step 3: Cross multiply
    39,103.66x = 58,663.70 × 16,920.20
  4. Step 4: Simplify right side
    39,103.66x = 992,601,536.74
  5. Step 5: Solve for x
    x = 992,601,536.74/39,103.66
  6. Step 6: Final answer
    x = 25,383.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.