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Finding the Fourth Proportional to 61,367.76, 84,689.64 and 34,515

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Solution

The fourth proportional to 61,367.76, 84,689.64 and 34,515 is: 47,631.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,367.76 : 84,689.64 = 34,515 : x
  2. Step 2: Convert to fraction form
    61,367.76/84,689.64 = 34,515/x
  3. Step 3: Cross multiply
    61,367.76x = 84,689.64 × 34,515
  4. Step 4: Simplify right side
    61,367.76x = 2,923,062,924.60
  5. Step 5: Solve for x
    x = 2,923,062,924.60/61,367.76
  6. Step 6: Final answer
    x = 47,631.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.