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Finding the Fourth Proportional to 73,980.35, 102,093.62 and 39,989.49

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Solution

The fourth proportional to 73,980.35, 102,093.62 and 39,989.49 is: 55,185.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,980.35 : 102,093.62 = 39,989.49 : x
  2. Step 2: Convert to fraction form
    73,980.35/102,093.62 = 39,989.49/x
  3. Step 3: Cross multiply
    73,980.35x = 102,093.62 × 39,989.49
  4. Step 4: Simplify right side
    73,980.35x = 4,082,671,896.03
  5. Step 5: Solve for x
    x = 4,082,671,896.03/73,980.35
  6. Step 6: Final answer
    x = 55,185.90

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1.5x scale

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.