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Finding the Fourth Proportional to 228,581.30, 315,479.57 and 136,694.58

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Solution

The fourth proportional to 228,581.30, 315,479.57 and 136,694.58 is: 188,660.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,581.30 : 315,479.57 = 136,694.58 : x
  2. Step 2: Convert to fraction form
    228,581.30/315,479.57 = 136,694.58/x
  3. Step 3: Cross multiply
    228,581.30x = 315,479.57 × 136,694.58
  4. Step 4: Simplify right side
    228,581.30x = 43,124,347,319.73
  5. Step 5: Solve for x
    x = 43,124,347,319.73/228,581.30
  6. Step 6: Final answer
    x = 188,660.87

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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.