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Finding the Fourth Proportional to 171,439.96, 257,220.44 and 76,661.32

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Solution

The fourth proportional to 171,439.96, 257,220.44 and 76,661.32 is: 115,019.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,439.96 : 257,220.44 = 76,661.32 : x
  2. Step 2: Convert to fraction form
    171,439.96/257,220.44 = 76,661.32/x
  3. Step 3: Cross multiply
    171,439.96x = 257,220.44 × 76,661.32
  4. Step 4: Simplify right side
    171,439.96x = 19,718,858,461.38
  5. Step 5: Solve for x
    x = 19,718,858,461.38/171,439.96
  6. Step 6: Final answer
    x = 115,019.03

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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.