Home / 66,161.12-91,299.68-39,302.88

Finding the Fourth Proportional to 66,161.12, 91,299.68 and 39,302.88

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Solution

The fourth proportional to 66,161.12, 91,299.68 and 39,302.88 is: 54,236.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,161.12 : 91,299.68 = 39,302.88 : x
  2. Step 2: Convert to fraction form
    66,161.12/91,299.68 = 39,302.88/x
  3. Step 3: Cross multiply
    66,161.12x = 91,299.68 × 39,302.88
  4. Step 4: Simplify right side
    66,161.12x = 3,588,340,367.08
  5. Step 5: Solve for x
    x = 3,588,340,367.08/66,161.12
  6. Step 6: Final answer
    x = 54,236.39

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1.5x scale

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.