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Finding the Fourth Proportional to 172,991.64, 238,687.92 and 105,006.99

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Solution

The fourth proportional to 172,991.64, 238,687.92 and 105,006.99 is: 144,885.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,991.64 : 238,687.92 = 105,006.99 : x
  2. Step 2: Convert to fraction form
    172,991.64/238,687.92 = 105,006.99/x
  3. Step 3: Cross multiply
    172,991.64x = 238,687.92 × 105,006.99
  4. Step 4: Simplify right side
    172,991.64x = 25,063,900,028.56
  5. Step 5: Solve for x
    x = 25,063,900,028.56/172,991.64
  6. Step 6: Final answer
    x = 144,885.04

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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.