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Finding the Fourth Proportional to 172,305.56, 258,195.21 and 72,411.15

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Solution

The fourth proportional to 172,305.56, 258,195.21 and 72,411.15 is: 108,506.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,305.56 : 258,195.21 = 72,411.15 : x
  2. Step 2: Convert to fraction form
    172,305.56/258,195.21 = 72,411.15/x
  3. Step 3: Cross multiply
    172,305.56x = 258,195.21 × 72,411.15
  4. Step 4: Simplify right side
    172,305.56x = 18,696,212,080.59
  5. Step 5: Solve for x
    x = 18,696,212,080.59/172,305.56
  6. Step 6: Final answer
    x = 108,506.15

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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.