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Finding the Fourth Proportional to 216,687.14, 299,043.54 and 121,202.72

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Solution

The fourth proportional to 216,687.14, 299,043.54 and 121,202.72 is: 167,268.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,687.14 : 299,043.54 = 121,202.72 : x
  2. Step 2: Convert to fraction form
    216,687.14/299,043.54 = 121,202.72/x
  3. Step 3: Cross multiply
    216,687.14x = 299,043.54 × 121,202.72
  4. Step 4: Simplify right side
    216,687.14x = 36,244,890,446.43
  5. Step 5: Solve for x
    x = 36,244,890,446.43/216,687.14
  6. Step 6: Final answer
    x = 167,268.30

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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.