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Finding the Fourth Proportional to 213,489.36, 320,223.11 and 63,730.89

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Solution

The fourth proportional to 213,489.36, 320,223.11 and 63,730.89 is: 95,593.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,489.36 : 320,223.11 = 63,730.89 : x
  2. Step 2: Convert to fraction form
    213,489.36/320,223.11 = 63,730.89/x
  3. Step 3: Cross multiply
    213,489.36x = 320,223.11 × 63,730.89
  4. Step 4: Simplify right side
    213,489.36x = 20,408,103,480.21
  5. Step 5: Solve for x
    x = 20,408,103,480.21/213,489.36
  6. Step 6: Final answer
    x = 95,593.07

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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.