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Finding the Fourth Proportional to 160,555.56, 240,982.78 and 81,728.79

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Solution

The fourth proportional to 160,555.56, 240,982.78 and 81,728.79 is: 122,669.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,555.56 : 240,982.78 = 81,728.79 : x
  2. Step 2: Convert to fraction form
    160,555.56/240,982.78 = 81,728.79/x
  3. Step 3: Cross multiply
    160,555.56x = 240,982.78 × 81,728.79
  4. Step 4: Simplify right side
    160,555.56x = 19,695,231,020.24
  5. Step 5: Solve for x
    x = 19,695,231,020.24/160,555.56
  6. Step 6: Final answer
    x = 122,669.26

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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.