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Finding the Fourth Proportional to 216,632.82, 298,954.20 and 121,139.46

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Solution

The fourth proportional to 216,632.82, 298,954.20 and 121,139.46 is: 167,172.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,632.82 : 298,954.20 = 121,139.46 : x
  2. Step 2: Convert to fraction form
    216,632.82/298,954.20 = 121,139.46/x
  3. Step 3: Cross multiply
    216,632.82x = 298,954.20 × 121,139.46
  4. Step 4: Simplify right side
    216,632.82x = 36,215,150,352.73
  5. Step 5: Solve for x
    x = 36,215,150,352.73/216,632.82
  6. Step 6: Final answer
    x = 167,172.96

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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.