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Finding the Fourth Proportional to 172,008.84, 258,029.55 and 66,835.92

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Solution

The fourth proportional to 172,008.84, 258,029.55 and 66,835.92 is: 100,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,008.84 : 258,029.55 = 66,835.92 : x
  2. Step 2: Convert to fraction form
    172,008.84/258,029.55 = 66,835.92/x
  3. Step 3: Cross multiply
    172,008.84x = 258,029.55 × 66,835.92
  4. Step 4: Simplify right side
    172,008.84x = 17,245,642,361.44
  5. Step 5: Solve for x
    x = 17,245,642,361.44/172,008.84
  6. Step 6: Final answer
    x = 100,260.21

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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.