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Finding the Fourth Proportional to 256,093.39, 353,442.32 and 142,939.63

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Solution

The fourth proportional to 256,093.39, 353,442.32 and 142,939.63 is: 197,275.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,093.39 : 353,442.32 = 142,939.63 : x
  2. Step 2: Convert to fraction form
    256,093.39/353,442.32 = 142,939.63/x
  3. Step 3: Cross multiply
    256,093.39x = 353,442.32 × 142,939.63
  4. Step 4: Simplify right side
    256,093.39x = 50,520,914,447.14
  5. Step 5: Solve for x
    x = 50,520,914,447.14/256,093.39
  6. Step 6: Final answer
    x = 197,275.36

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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.