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Finding the Fourth Proportional to 75,319.94, 103,950.74 and 43,488.79

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Solution

The fourth proportional to 75,319.94, 103,950.74 and 43,488.79 is: 60,019.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,319.94 : 103,950.74 = 43,488.79 : x
  2. Step 2: Convert to fraction form
    75,319.94/103,950.74 = 43,488.79/x
  3. Step 3: Cross multiply
    75,319.94x = 103,950.74 × 43,488.79
  4. Step 4: Simplify right side
    75,319.94x = 4,520,691,902.20
  5. Step 5: Solve for x
    x = 4,520,691,902.20/75,319.94
  6. Step 6: Final answer
    x = 60,019.86

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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.