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Finding the Fourth Proportional to 121,805.60, 168,092.64 and 68,092.80

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Solution

The fourth proportional to 121,805.60, 168,092.64 and 68,092.80 is: 93,968.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,805.60 : 168,092.64 = 68,092.80 : x
  2. Step 2: Convert to fraction form
    121,805.60/168,092.64 = 68,092.80/x
  3. Step 3: Cross multiply
    121,805.60x = 168,092.64 × 68,092.80
  4. Step 4: Simplify right side
    121,805.60x = 11,445,898,516.99
  5. Step 5: Solve for x
    x = 11,445,898,516.99/121,805.60
  6. Step 6: Final answer
    x = 93,968.57

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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.