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Finding the Fourth Proportional to 78,073.00, 117,109.77 and 18,908.71

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Solution

The fourth proportional to 78,073.00, 117,109.77 and 18,908.71 is: 28,363.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,073.00 : 117,109.77 = 18,908.71 : x
  2. Step 2: Convert to fraction form
    78,073.00/117,109.77 = 18,908.71/x
  3. Step 3: Cross multiply
    78,073.00x = 117,109.77 × 18,908.71
  4. Step 4: Simplify right side
    78,073.00x = 2,214,394,093.55
  5. Step 5: Solve for x
    x = 2,214,394,093.55/78,073.00
  6. Step 6: Final answer
    x = 28,363.12

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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.