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Finding the Fourth Proportional to 61,698.63, 85,139.27 and 34,843.80

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Solution

The fourth proportional to 61,698.63, 85,139.27 and 34,843.80 is: 48,081.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,698.63 : 85,139.27 = 34,843.80 : x
  2. Step 2: Convert to fraction form
    61,698.63/85,139.27 = 34,843.80/x
  3. Step 3: Cross multiply
    61,698.63x = 85,139.27 × 34,843.80
  4. Step 4: Simplify right side
    61,698.63x = 2,966,575,521.81
  5. Step 5: Solve for x
    x = 2,966,575,521.81/61,698.63
  6. Step 6: Final answer
    x = 48,081.71

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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.