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Finding the Fourth Proportional to 172,638.84, 258,910.02 and 109,364.88

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Solution

The fourth proportional to 172,638.84, 258,910.02 and 109,364.88 is: 164,016.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,638.84 : 258,910.02 = 109,364.88 : x
  2. Step 2: Convert to fraction form
    172,638.84/258,910.02 = 109,364.88/x
  3. Step 3: Cross multiply
    172,638.84x = 258,910.02 × 109,364.88
  4. Step 4: Simplify right side
    172,638.84x = 28,315,663,268.10
  5. Step 5: Solve for x
    x = 28,315,663,268.10/172,638.84
  6. Step 6: Final answer
    x = 164,016.76

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1.5x scale

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.