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Finding the Fourth Proportional to 121,884.61, 168,199.79 and 68,169.59

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Solution

The fourth proportional to 121,884.61, 168,199.79 and 68,169.59 is: 94,073.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,884.61 : 168,199.79 = 68,169.59 : x
  2. Step 2: Convert to fraction form
    121,884.61/168,199.79 = 68,169.59/x
  3. Step 3: Cross multiply
    121,884.61x = 168,199.79 × 68,169.59
  4. Step 4: Simplify right side
    121,884.61x = 11,466,110,137.02
  5. Step 5: Solve for x
    x = 11,466,110,137.02/121,884.61
  6. Step 6: Final answer
    x = 94,073.48

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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.