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Finding the Fourth Proportional to 51,005.90, 76,434.15 and 45,740.90

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Solution

The fourth proportional to 51,005.90, 76,434.15 and 45,740.90 is: 68,544.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,005.90 : 76,434.15 = 45,740.90 : x
  2. Step 2: Convert to fraction form
    51,005.90/76,434.15 = 45,740.90/x
  3. Step 3: Cross multiply
    51,005.90x = 76,434.15 × 45,740.90
  4. Step 4: Simplify right side
    51,005.90x = 3,496,166,811.74
  5. Step 5: Solve for x
    x = 3,496,166,811.74/51,005.90
  6. Step 6: Final answer
    x = 68,544.36

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