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Finding the Fourth Proportional to 236,390.12, 326,211.90 and 128,960.12

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Solution

The fourth proportional to 236,390.12, 326,211.90 and 128,960.12 is: 177,961.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,390.12 : 326,211.90 = 128,960.12 : x
  2. Step 2: Convert to fraction form
    236,390.12/326,211.90 = 128,960.12/x
  3. Step 3: Cross multiply
    236,390.12x = 326,211.90 × 128,960.12
  4. Step 4: Simplify right side
    236,390.12x = 42,068,325,769.43
  5. Step 5: Solve for x
    x = 42,068,325,769.43/236,390.12
  6. Step 6: Final answer
    x = 177,961.44

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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.