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Finding the Fourth Proportional to 58,361.76, 87,556.50 and 18,918.90

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Solution

The fourth proportional to 58,361.76, 87,556.50 and 18,918.90 is: 28,382.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,361.76 : 87,556.50 = 18,918.90 : x
  2. Step 2: Convert to fraction form
    58,361.76/87,556.50 = 18,918.90/x
  3. Step 3: Cross multiply
    58,361.76x = 87,556.50 × 18,918.90
  4. Step 4: Simplify right side
    58,361.76x = 1,656,472,667.85
  5. Step 5: Solve for x
    x = 1,656,472,667.85/58,361.76
  6. Step 6: Final answer
    x = 28,382.84

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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.