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Finding the Fourth Proportional to 225,612.84, 311,345.43 and 123,644.70

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Solution

The fourth proportional to 225,612.84, 311,345.43 and 123,644.70 is: 170,629.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,612.84 : 311,345.43 = 123,644.70 : x
  2. Step 2: Convert to fraction form
    225,612.84/311,345.43 = 123,644.70/x
  3. Step 3: Cross multiply
    225,612.84x = 311,345.43 × 123,644.70
  4. Step 4: Simplify right side
    225,612.84x = 38,496,212,288.72
  5. Step 5: Solve for x
    x = 38,496,212,288.72/225,612.84
  6. Step 6: Final answer
    x = 170,629.53

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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.