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Finding the Fourth Proportional to 121,833, 168,129.54 and 68,841

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Solution

The fourth proportional to 121,833, 168,129.54 and 68,841 is: 95,000.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,833 : 168,129.54 = 68,841 : x
  2. Step 2: Convert to fraction form
    121,833/168,129.54 = 68,841/x
  3. Step 3: Cross multiply
    121,833x = 168,129.54 × 68,841
  4. Step 4: Simplify right side
    121,833x = 11,574,205,663.14
  5. Step 5: Solve for x
    x = 11,574,205,663.14/121,833
  6. Step 6: Final answer
    x = 95,000.58

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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.