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Finding the Fourth Proportional to 352,422.54, 528,629.19 and 86,185.37

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Solution

The fourth proportional to 352,422.54, 528,629.19 and 86,185.37 is: 129,276.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,422.54 : 528,629.19 = 86,185.37 : x
  2. Step 2: Convert to fraction form
    352,422.54/528,629.19 = 86,185.37/x
  3. Step 3: Cross multiply
    352,422.54x = 528,629.19 × 86,185.37
  4. Step 4: Simplify right side
    352,422.54x = 45,560,099,689.80
  5. Step 5: Solve for x
    x = 45,560,099,689.80/352,422.54
  6. Step 6: Final answer
    x = 129,276.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.