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Finding the Fourth Proportional to 121,753.82, 168,019.87 and 68,038.83

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Solution

The fourth proportional to 121,753.82, 168,019.87 and 68,038.83 is: 93,893.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,753.82 : 168,019.87 = 68,038.83 : x
  2. Step 2: Convert to fraction form
    121,753.82/168,019.87 = 68,038.83/x
  3. Step 3: Cross multiply
    121,753.82x = 168,019.87 × 68,038.83
  4. Step 4: Simplify right side
    121,753.82x = 11,431,875,371.55
  5. Step 5: Solve for x
    x = 11,431,875,371.55/121,753.82
  6. Step 6: Final answer
    x = 93,893.36

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1.5x scale

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.