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Finding the Fourth Proportional to 225,524.93, 311,137.61 and 128,734.25

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Solution

The fourth proportional to 225,524.93, 311,137.61 and 128,734.25 is: 177,603.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,524.93 : 311,137.61 = 128,734.25 : x
  2. Step 2: Convert to fraction form
    225,524.93/311,137.61 = 128,734.25/x
  3. Step 3: Cross multiply
    225,524.93x = 311,137.61 × 128,734.25
  4. Step 4: Simplify right side
    225,524.93x = 40,054,064,670.78
  5. Step 5: Solve for x
    x = 40,054,064,670.78/225,524.93
  6. Step 6: Final answer
    x = 177,603.72

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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.