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Finding the Fourth Proportional to 73,985.49, 102,100.41 and 39,993.87

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Solution

The fourth proportional to 73,985.49, 102,100.41 and 39,993.87 is: 55,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,985.49 : 102,100.41 = 39,993.87 : x
  2. Step 2: Convert to fraction form
    73,985.49/102,100.41 = 39,993.87/x
  3. Step 3: Cross multiply
    73,985.49x = 102,100.41 × 39,993.87
  4. Step 4: Simplify right side
    73,985.49x = 4,083,390,524.49
  5. Step 5: Solve for x
    x = 4,083,390,524.49/73,985.49
  6. Step 6: Final answer
    x = 55,191.78

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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.