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Finding the Fourth Proportional to 66,062.39, 91,209.98 and 39,213.52

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Solution

The fourth proportional to 66,062.39, 91,209.98 and 39,213.52 is: 54,140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,062.39 : 91,209.98 = 39,213.52 : x
  2. Step 2: Convert to fraction form
    66,062.39/91,209.98 = 39,213.52/x
  3. Step 3: Cross multiply
    66,062.39x = 91,209.98 × 39,213.52
  4. Step 4: Simplify right side
    66,062.39x = 3,576,664,244.94
  5. Step 5: Solve for x
    x = 3,576,664,244.94/66,062.39
  6. Step 6: Final answer
    x = 54,140.71

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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.