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Finding the Fourth Proportional to 66,617.94, 91,939.14 and 36,407.87

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Solution

The fourth proportional to 66,617.94, 91,939.14 and 36,407.87 is: 50,246.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,617.94 : 91,939.14 = 36,407.87 : x
  2. Step 2: Convert to fraction form
    66,617.94/91,939.14 = 36,407.87/x
  3. Step 3: Cross multiply
    66,617.94x = 91,939.14 × 36,407.87
  4. Step 4: Simplify right side
    66,617.94x = 3,347,307,797.34
  5. Step 5: Solve for x
    x = 3,347,307,797.34/66,617.94
  6. Step 6: Final answer
    x = 50,246.34

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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.