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Finding the Fourth Proportional to 189,956.92, 262,154.79 and 108,287.12

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Solution

The fourth proportional to 189,956.92, 262,154.79 and 108,287.12 is: 149,444.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,956.92 : 262,154.79 = 108,287.12 : x
  2. Step 2: Convert to fraction form
    189,956.92/262,154.79 = 108,287.12/x
  3. Step 3: Cross multiply
    189,956.92x = 262,154.79 × 108,287.12
  4. Step 4: Simplify right side
    189,956.92x = 28,387,987,203.30
  5. Step 5: Solve for x
    x = 28,387,987,203.30/189,956.92
  6. Step 6: Final answer
    x = 149,444.34

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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.