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Finding the Fourth Proportional to 92,381.37, 127,485.90 and 49,939.80

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Solution

The fourth proportional to 92,381.37, 127,485.90 and 49,939.80 is: 68,916.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,381.37 : 127,485.90 = 49,939.80 : x
  2. Step 2: Convert to fraction form
    92,381.37/127,485.90 = 49,939.80/x
  3. Step 3: Cross multiply
    92,381.37x = 127,485.90 × 49,939.80
  4. Step 4: Simplify right side
    92,381.37x = 6,366,620,348.82
  5. Step 5: Solve for x
    x = 6,366,620,348.82/92,381.37
  6. Step 6: Final answer
    x = 68,916.71

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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.