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Finding the Fourth Proportional to 172,340.40, 258,518.70 and 54,015.60

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Solution

The fourth proportional to 172,340.40, 258,518.70 and 54,015.60 is: 81,025.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,340.40 : 258,518.70 = 54,015.60 : x
  2. Step 2: Convert to fraction form
    172,340.40/258,518.70 = 54,015.60/x
  3. Step 3: Cross multiply
    172,340.40x = 258,518.70 × 54,015.60
  4. Step 4: Simplify right side
    172,340.40x = 13,964,042,691.72
  5. Step 5: Solve for x
    x = 13,964,042,691.72/172,340.40
  6. Step 6: Final answer
    x = 81,025.94

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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.