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Finding the Fourth Proportional to 72,935, 100,650.34 and 39,401

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Solution

The fourth proportional to 72,935, 100,650.34 and 39,401 is: 54,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,935 : 100,650.34 = 39,401 : x
  2. Step 2: Convert to fraction form
    72,935/100,650.34 = 39,401/x
  3. Step 3: Cross multiply
    72,935x = 100,650.34 × 39,401
  4. Step 4: Simplify right side
    72,935x = 3,965,724,046.34
  5. Step 5: Solve for x
    x = 3,965,724,046.34/72,935
  6. Step 6: Final answer
    x = 54,373.40

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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.