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Finding the Fourth Proportional to 213,673.63, 320,392.11 and 87,402.54

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Solution

The fourth proportional to 213,673.63, 320,392.11 and 87,402.54 is: 131,055.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,673.63 : 320,392.11 = 87,402.54 : x
  2. Step 2: Convert to fraction form
    213,673.63/320,392.11 = 87,402.54/x
  3. Step 3: Cross multiply
    213,673.63x = 320,392.11 × 87,402.54
  4. Step 4: Simplify right side
    213,673.63x = 28,003,085,247.55
  5. Step 5: Solve for x
    x = 28,003,085,247.55/213,673.63
  6. Step 6: Final answer
    x = 131,055.41

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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.