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Finding the Fourth Proportional to 121,834, 168,130.92 and 68,842

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Solution

The fourth proportional to 121,834, 168,130.92 and 68,842 is: 95,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,834 : 168,130.92 = 68,842 : x
  2. Step 2: Convert to fraction form
    121,834/168,130.92 = 68,842/x
  3. Step 3: Cross multiply
    121,834x = 168,130.92 × 68,842
  4. Step 4: Simplify right side
    121,834x = 11,574,468,794.64
  5. Step 5: Solve for x
    x = 11,574,468,794.64/121,834
  6. Step 6: Final answer
    x = 95,001.96

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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.