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Finding the Fourth Proportional to 229,183.68, 316,285.92 and 128,579.52

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Solution

The fourth proportional to 229,183.68, 316,285.92 and 128,579.52 is: 177,446.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,183.68 : 316,285.92 = 128,579.52 : x
  2. Step 2: Convert to fraction form
    229,183.68/316,285.92 = 128,579.52/x
  3. Step 3: Cross multiply
    229,183.68x = 316,285.92 × 128,579.52
  4. Step 4: Simplify right side
    229,183.68x = 40,667,891,776.36
  5. Step 5: Solve for x
    x = 40,667,891,776.36/229,183.68
  6. Step 6: Final answer
    x = 177,446.72

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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.