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Finding the Fourth Proportional to 66,339.64, 91,638.25 and 53,004.41

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Solution

The fourth proportional to 66,339.64, 91,638.25 and 53,004.41 is: 73,217.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,339.64 : 91,638.25 = 53,004.41 : x
  2. Step 2: Convert to fraction form
    66,339.64/91,638.25 = 53,004.41/x
  3. Step 3: Cross multiply
    66,339.64x = 91,638.25 × 53,004.41
  4. Step 4: Simplify right side
    66,339.64x = 4,857,230,783.98
  5. Step 5: Solve for x
    x = 4,857,230,783.98/66,339.64
  6. Step 6: Final answer
    x = 73,217.63

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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.