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Finding the Fourth Proportional to 132,431.75, 182,755.85 and 72,815.75

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Solution

The fourth proportional to 132,431.75, 182,755.85 and 72,815.75 is: 100,485.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,431.75 : 182,755.85 = 72,815.75 : x
  2. Step 2: Convert to fraction form
    132,431.75/182,755.85 = 72,815.75/x
  3. Step 3: Cross multiply
    132,431.75x = 182,755.85 × 72,815.75
  4. Step 4: Simplify right side
    132,431.75x = 13,307,504,284.64
  5. Step 5: Solve for x
    x = 13,307,504,284.64/132,431.75
  6. Step 6: Final answer
    x = 100,485.75

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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.