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Finding the Fourth Proportional to 171,185.39, 256,638.96 and 71,419.92

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Solution

The fourth proportional to 171,185.39, 256,638.96 and 71,419.92 is: 107,071.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,185.39 : 256,638.96 = 71,419.92 : x
  2. Step 2: Convert to fraction form
    171,185.39/256,638.96 = 71,419.92/x
  3. Step 3: Cross multiply
    171,185.39x = 256,638.96 × 71,419.92
  4. Step 4: Simplify right side
    171,185.39x = 18,329,133,992.08
  5. Step 5: Solve for x
    x = 18,329,133,992.08/171,185.39
  6. Step 6: Final answer
    x = 107,071.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.