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Finding the Fourth Proportional to 61,986.36, 85,541.79 and 36,831

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Solution

The fourth proportional to 61,986.36, 85,541.79 and 36,831 is: 50,827.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,986.36 : 85,541.79 = 36,831 : x
  2. Step 2: Convert to fraction form
    61,986.36/85,541.79 = 36,831/x
  3. Step 3: Cross multiply
    61,986.36x = 85,541.79 × 36,831
  4. Step 4: Simplify right side
    61,986.36x = 3,150,589,667.49
  5. Step 5: Solve for x
    x = 3,150,589,667.49/61,986.36
  6. Step 6: Final answer
    x = 50,827.14

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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.