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Finding the Fourth Proportional to 171,563.56, 257,060.80 and 121,395

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Solution

The fourth proportional to 171,563.56, 257,060.80 and 121,395 is: 181,891.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,563.56 : 257,060.80 = 121,395 : x
  2. Step 2: Convert to fraction form
    171,563.56/257,060.80 = 121,395/x
  3. Step 3: Cross multiply
    171,563.56x = 257,060.80 × 121,395
  4. Step 4: Simplify right side
    171,563.56x = 31,205,895,816
  5. Step 5: Solve for x
    x = 31,205,895,816/171,563.56
  6. Step 6: Final answer
    x = 181,891.17

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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.