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Finding the Fourth Proportional to 61,886.61, 85,396.43 and 34,658.91

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Solution

The fourth proportional to 61,886.61, 85,396.43 and 34,658.91 is: 47,825.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,886.61 : 85,396.43 = 34,658.91 : x
  2. Step 2: Convert to fraction form
    61,886.61/85,396.43 = 34,658.91/x
  3. Step 3: Cross multiply
    61,886.61x = 85,396.43 × 34,658.91
  4. Step 4: Simplify right side
    61,886.61x = 2,959,747,268.34
  5. Step 5: Solve for x
    x = 2,959,747,268.34/61,886.61
  6. Step 6: Final answer
    x = 47,825.33

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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.