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Finding the Fourth Proportional to 154,660.68, 213,449.45 and 86,696.01

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Solution

The fourth proportional to 154,660.68, 213,449.45 and 86,696.01 is: 119,650.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,660.68 : 213,449.45 = 86,696.01 : x
  2. Step 2: Convert to fraction form
    154,660.68/213,449.45 = 86,696.01/x
  3. Step 3: Cross multiply
    154,660.68x = 213,449.45 × 86,696.01
  4. Step 4: Simplify right side
    154,660.68x = 18,505,215,218.21
  5. Step 5: Solve for x
    x = 18,505,215,218.21/154,660.68
  6. Step 6: Final answer
    x = 119,650.42

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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.