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Finding the Fourth Proportional to 66,629.16, 91,937.16 and 39,782.52

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Solution

The fourth proportional to 66,629.16, 91,937.16 and 39,782.52 is: 54,893.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,629.16 : 91,937.16 = 39,782.52 : x
  2. Step 2: Convert to fraction form
    66,629.16/91,937.16 = 39,782.52/x
  3. Step 3: Cross multiply
    66,629.16x = 91,937.16 × 39,782.52
  4. Step 4: Simplify right side
    66,629.16x = 3,657,491,906.44
  5. Step 5: Solve for x
    x = 3,657,491,906.44/66,629.16
  6. Step 6: Final answer
    x = 54,893.26

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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.