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Finding the Fourth Proportional to 121,493.87, 167,512.58 and 99,908.18

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Solution

The fourth proportional to 121,493.87, 167,512.58 and 99,908.18 is: 137,750.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,493.87 : 167,512.58 = 99,908.18 : x
  2. Step 2: Convert to fraction form
    121,493.87/167,512.58 = 99,908.18/x
  3. Step 3: Cross multiply
    121,493.87x = 167,512.58 × 99,908.18
  4. Step 4: Simplify right side
    121,493.87x = 16,735,876,157.34
  5. Step 5: Solve for x
    x = 16,735,876,157.34/121,493.87
  6. Step 6: Final answer
    x = 137,750.79

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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.