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Finding the Fourth Proportional to 216,974.88, 299,419.20 and 121,489.92

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Solution

The fourth proportional to 216,974.88, 299,419.20 and 121,489.92 is: 167,652.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,974.88 : 299,419.20 = 121,489.92 : x
  2. Step 2: Convert to fraction form
    216,974.88/299,419.20 = 121,489.92/x
  3. Step 3: Cross multiply
    216,974.88x = 299,419.20 × 121,489.92
  4. Step 4: Simplify right side
    216,974.88x = 36,376,414,654.46
  5. Step 5: Solve for x
    x = 36,376,414,654.46/216,974.88
  6. Step 6: Final answer
    x = 167,652.65

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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.