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Finding the Fourth Proportional to 256,081.92, 353,393.34 and 142,904.64

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Solution

The fourth proportional to 256,081.92, 353,393.34 and 142,904.64 is: 197,208.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,081.92 : 353,393.34 = 142,904.64 : x
  2. Step 2: Convert to fraction form
    256,081.92/353,393.34 = 142,904.64/x
  3. Step 3: Cross multiply
    256,081.92x = 353,393.34 × 142,904.64
  4. Step 4: Simplify right side
    256,081.92x = 50,501,548,031.10
  5. Step 5: Solve for x
    x = 50,501,548,031.10/256,081.92
  6. Step 6: Final answer
    x = 197,208.57

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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.