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Finding the Fourth Proportional to 92,707.52, 138,716.81 and 55,287.95

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Solution

The fourth proportional to 92,707.52, 138,716.81 and 55,287.95 is: 82,726.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,707.52 : 138,716.81 = 55,287.95 : x
  2. Step 2: Convert to fraction form
    92,707.52/138,716.81 = 55,287.95/x
  3. Step 3: Cross multiply
    92,707.52x = 138,716.81 × 55,287.95
  4. Step 4: Simplify right side
    92,707.52x = 7,669,367,779.00
  5. Step 5: Solve for x
    x = 7,669,367,779.00/92,707.52
  6. Step 6: Final answer
    x = 82,726.49

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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.