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Finding the Fourth Proportional to 312,345.92, 431,036.76 and 169,105.94

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Solution

The fourth proportional to 312,345.92, 431,036.76 and 169,105.94 is: 233,365.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,345.92 : 431,036.76 = 169,105.94 : x
  2. Step 2: Convert to fraction form
    312,345.92/431,036.76 = 169,105.94/x
  3. Step 3: Cross multiply
    312,345.92x = 431,036.76 × 169,105.94
  4. Step 4: Simplify right side
    312,345.92x = 72,890,876,474.35
  5. Step 5: Solve for x
    x = 72,890,876,474.35/312,345.92
  6. Step 6: Final answer
    x = 233,365.87

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1.5x scale

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.