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Finding the Fourth Proportional to 121,753.83, 168,020.01 and 68,038.86

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Solution

The fourth proportional to 121,753.83, 168,020.01 and 68,038.86 is: 93,893.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,753.83 : 168,020.01 = 68,038.86 : x
  2. Step 2: Convert to fraction form
    121,753.83/168,020.01 = 68,038.86/x
  3. Step 3: Cross multiply
    121,753.83x = 168,020.01 × 68,038.86
  4. Step 4: Simplify right side
    121,753.83x = 11,431,889,937.59
  5. Step 5: Solve for x
    x = 11,431,889,937.59/121,753.83
  6. Step 6: Final answer
    x = 93,893.47

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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.