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Finding the Fourth Proportional to 61,212.70, 91,709.70 and 52,464.70

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Solution

The fourth proportional to 61,212.70, 91,709.70 and 52,464.70 is: 78,603.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212.70 : 91,709.70 = 52,464.70 : x
  2. Step 2: Convert to fraction form
    61,212.70/91,709.70 = 52,464.70/x
  3. Step 3: Cross multiply
    61,212.70x = 91,709.70 × 52,464.70
  4. Step 4: Simplify right side
    61,212.70x = 4,811,521,897.59
  5. Step 5: Solve for x
    x = 4,811,521,897.59/61,212.70
  6. Step 6: Final answer
    x = 78,603.33

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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.