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Finding the Fourth Proportional to 172,628.10, 258,942.15 and 54,335.70

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Solution

The fourth proportional to 172,628.10, 258,942.15 and 54,335.70 is: 81,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,628.10 : 258,942.15 = 54,335.70 : x
  2. Step 2: Convert to fraction form
    172,628.10/258,942.15 = 54,335.70/x
  3. Step 3: Cross multiply
    172,628.10x = 258,942.15 × 54,335.70
  4. Step 4: Simplify right side
    172,628.10x = 14,069,802,979.76
  5. Step 5: Solve for x
    x = 14,069,802,979.76/172,628.10
  6. Step 6: Final answer
    x = 81,503.55

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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.