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Finding the Fourth Proportional to 92,699.91, 127,916.42 and 56,891.43

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Solution

The fourth proportional to 92,699.91, 127,916.42 and 56,891.43 is: 78,504.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,699.91 : 127,916.42 = 56,891.43 : x
  2. Step 2: Convert to fraction form
    92,699.91/127,916.42 = 56,891.43/x
  3. Step 3: Cross multiply
    92,699.91x = 127,916.42 × 56,891.43
  4. Step 4: Simplify right side
    92,699.91x = 7,277,347,769.82
  5. Step 5: Solve for x
    x = 7,277,347,769.82/92,699.91
  6. Step 6: Final answer
    x = 78,504.37

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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.