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Finding the Fourth Proportional to 121,903.34, 168,218.69 and 68,179.05

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Solution

The fourth proportional to 121,903.34, 168,218.69 and 68,179.05 is: 94,082.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,903.34 : 168,218.69 = 68,179.05 : x
  2. Step 2: Convert to fraction form
    121,903.34/168,218.69 = 68,179.05/x
  3. Step 3: Cross multiply
    121,903.34x = 168,218.69 × 68,179.05
  4. Step 4: Simplify right side
    121,903.34x = 11,468,990,135.55
  5. Step 5: Solve for x
    x = 11,468,990,135.55/121,903.34
  6. Step 6: Final answer
    x = 94,082.66

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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.