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Finding the Fourth Proportional to 121,889.96, 168,216.12 and 68,184.24

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Solution

The fourth proportional to 121,889.96, 168,216.12 and 68,184.24 is: 94,098.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,889.96 : 168,216.12 = 68,184.24 : x
  2. Step 2: Convert to fraction form
    121,889.96/168,216.12 = 68,184.24/x
  3. Step 3: Cross multiply
    121,889.96x = 168,216.12 × 68,184.24
  4. Step 4: Simplify right side
    121,889.96x = 11,469,688,297.95
  5. Step 5: Solve for x
    x = 11,469,688,297.95/121,889.96
  6. Step 6: Final answer
    x = 94,098.71

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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.