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Finding the Fourth Proportional to 91,751.12, 137,593.66 and 31,763.32

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Solution

The fourth proportional to 91,751.12, 137,593.66 and 31,763.32 is: 47,633.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,751.12 : 137,593.66 = 31,763.32 : x
  2. Step 2: Convert to fraction form
    91,751.12/137,593.66 = 31,763.32/x
  3. Step 3: Cross multiply
    91,751.12x = 137,593.66 × 31,763.32
  4. Step 4: Simplify right side
    91,751.12x = 4,370,431,452.55
  5. Step 5: Solve for x
    x = 4,370,431,452.55/91,751.12
  6. Step 6: Final answer
    x = 47,633.55

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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.