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Finding the Fourth Proportional to 76,801.61, 105,898.43 and 62,422.09

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Solution

The fourth proportional to 76,801.61, 105,898.43 and 62,422.09 is: 86,071.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,801.61 : 105,898.43 = 62,422.09 : x
  2. Step 2: Convert to fraction form
    76,801.61/105,898.43 = 62,422.09/x
  3. Step 3: Cross multiply
    76,801.61x = 105,898.43 × 62,422.09
  4. Step 4: Simplify right side
    76,801.61x = 6,610,400,486.72
  5. Step 5: Solve for x
    x = 6,610,400,486.72/76,801.61
  6. Step 6: Final answer
    x = 86,071.12

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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.