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Finding the Fourth Proportional to 123,939.86, 185,900.06 and 45,071.78

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Solution

The fourth proportional to 123,939.86, 185,900.06 and 45,071.78 is: 67,604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,939.86 : 185,900.06 = 45,071.78 : x
  2. Step 2: Convert to fraction form
    123,939.86/185,900.06 = 45,071.78/x
  3. Step 3: Cross multiply
    123,939.86x = 185,900.06 × 45,071.78
  4. Step 4: Simplify right side
    123,939.86x = 8,378,846,606.31
  5. Step 5: Solve for x
    x = 8,378,846,606.31/123,939.86
  6. Step 6: Final answer
    x = 67,604.13

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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.