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Finding the Fourth Proportional to 61,496.70, 92,115.45 and 51,128.70

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Solution

The fourth proportional to 61,496.70, 92,115.45 and 51,128.70 is: 76,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,496.70 : 92,115.45 = 51,128.70 : x
  2. Step 2: Convert to fraction form
    61,496.70/92,115.45 = 51,128.70/x
  3. Step 3: Cross multiply
    61,496.70x = 92,115.45 × 51,128.70
  4. Step 4: Simplify right side
    61,496.70x = 4,709,743,208.42
  5. Step 5: Solve for x
    x = 4,709,743,208.42/61,496.70
  6. Step 6: Final answer
    x = 76,585.30

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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.