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Finding the Fourth Proportional to 121,892.45, 168,212.65 and 68,182.46

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Solution

The fourth proportional to 121,892.45, 168,212.65 and 68,182.46 is: 94,092.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,892.45 : 168,212.65 = 68,182.46 : x
  2. Step 2: Convert to fraction form
    121,892.45/168,212.65 = 68,182.46/x
  3. Step 3: Cross multiply
    121,892.45x = 168,212.65 × 68,182.46
  4. Step 4: Simplify right side
    121,892.45x = 11,469,152,280.12
  5. Step 5: Solve for x
    x = 11,469,152,280.12/121,892.45
  6. Step 6: Final answer
    x = 94,092.40

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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.