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Finding the Fourth Proportional to 121,493.85, 167,660.98 and 67,778.90

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Solution

The fourth proportional to 121,493.85, 167,660.98 and 67,778.90 is: 93,534.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,493.85 : 167,660.98 = 67,778.90 : x
  2. Step 2: Convert to fraction form
    121,493.85/167,660.98 = 67,778.90/x
  3. Step 3: Cross multiply
    121,493.85x = 167,660.98 × 67,778.90
  4. Step 4: Simplify right side
    121,493.85x = 11,363,876,797.32
  5. Step 5: Solve for x
    x = 11,363,876,797.32/121,493.85
  6. Step 6: Final answer
    x = 93,534.58

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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.