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Finding the Fourth Proportional to 171,231.76, 256,499.48 and 139,754

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Solution

The fourth proportional to 171,231.76, 256,499.48 and 139,754 is: 209,346.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,231.76 : 256,499.48 = 139,754 : x
  2. Step 2: Convert to fraction form
    171,231.76/256,499.48 = 139,754/x
  3. Step 3: Cross multiply
    171,231.76x = 256,499.48 × 139,754
  4. Step 4: Simplify right side
    171,231.76x = 35,846,828,327.92
  5. Step 5: Solve for x
    x = 35,846,828,327.92/171,231.76
  6. Step 6: Final answer
    x = 209,346.84

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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.