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Finding the Fourth Proportional to 39,072.54, 58,616.07 and 12,778.68

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Solution

The fourth proportional to 39,072.54, 58,616.07 and 12,778.68 is: 19,170.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,072.54 : 58,616.07 = 12,778.68 : x
  2. Step 2: Convert to fraction form
    39,072.54/58,616.07 = 12,778.68/x
  3. Step 3: Cross multiply
    39,072.54x = 58,616.07 × 12,778.68
  4. Step 4: Simplify right side
    39,072.54x = 749,036,001.39
  5. Step 5: Solve for x
    x = 749,036,001.39/39,072.54
  6. Step 6: Final answer
    x = 19,170.39

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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.