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Finding the Fourth Proportional to 61,605.80, 92,408.70 and 57,717.80

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Solution

The fourth proportional to 61,605.80, 92,408.70 and 57,717.80 is: 86,576.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,605.80 : 92,408.70 = 57,717.80 : x
  2. Step 2: Convert to fraction form
    61,605.80/92,408.70 = 57,717.80/x
  3. Step 3: Cross multiply
    61,605.80x = 92,408.70 × 57,717.80
  4. Step 4: Simplify right side
    61,605.80x = 5,333,626,864.86
  5. Step 5: Solve for x
    x = 5,333,626,864.86/61,605.80
  6. Step 6: Final answer
    x = 86,576.70

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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.