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Finding the Fourth Proportional to 69,712.78, 96,203.38 and 39,503.87

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Solution

The fourth proportional to 69,712.78, 96,203.38 and 39,503.87 is: 54,515.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,712.78 : 96,203.38 = 39,503.87 : x
  2. Step 2: Convert to fraction form
    69,712.78/96,203.38 = 39,503.87/x
  3. Step 3: Cross multiply
    69,712.78x = 96,203.38 × 39,503.87
  4. Step 4: Simplify right side
    69,712.78x = 3,800,405,911.34
  5. Step 5: Solve for x
    x = 3,800,405,911.34/69,712.78
  6. Step 6: Final answer
    x = 54,515.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.