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Finding the Fourth Proportional to 92,908.52, 128,266.96 and 61,169.68

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Solution

The fourth proportional to 92,908.52, 128,266.96 and 61,169.68 is: 84,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,908.52 : 128,266.96 = 61,169.68 : x
  2. Step 2: Convert to fraction form
    92,908.52/128,266.96 = 61,169.68/x
  3. Step 3: Cross multiply
    92,908.52x = 128,266.96 × 61,169.68
  4. Step 4: Simplify right side
    92,908.52x = 7,846,048,897.77
  5. Step 5: Solve for x
    x = 7,846,048,897.77/92,908.52
  6. Step 6: Final answer
    x = 84,449.19

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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.