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Finding the Fourth Proportional to 201,788.64, 278,468.31 and 116,954.91

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Solution

The fourth proportional to 201,788.64, 278,468.31 and 116,954.91 is: 161,397.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,788.64 : 278,468.31 = 116,954.91 : x
  2. Step 2: Convert to fraction form
    201,788.64/278,468.31 = 116,954.91/x
  3. Step 3: Cross multiply
    201,788.64x = 278,468.31 × 116,954.91
  4. Step 4: Simplify right side
    201,788.64x = 32,568,236,133.90
  5. Step 5: Solve for x
    x = 32,568,236,133.90/201,788.64
  6. Step 6: Final answer
    x = 161,397.77

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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.