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Finding the Fourth Proportional to 172,991.45, 238,732.38 and 96,509.99

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Solution

The fourth proportional to 172,991.45, 238,732.38 and 96,509.99 is: 133,186.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,991.45 : 238,732.38 = 96,509.99 : x
  2. Step 2: Convert to fraction form
    172,991.45/238,732.38 = 96,509.99/x
  3. Step 3: Cross multiply
    172,991.45x = 238,732.38 × 96,509.99
  4. Step 4: Simplify right side
    172,991.45x = 23,040,058,412.81
  5. Step 5: Solve for x
    x = 23,040,058,412.81/172,991.45
  6. Step 6: Final answer
    x = 133,186.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.