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Finding the Fourth Proportional to 172,023.40, 258,035.10 and 118,879.30

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Solution

The fourth proportional to 172,023.40, 258,035.10 and 118,879.30 is: 178,318.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,023.40 : 258,035.10 = 118,879.30 : x
  2. Step 2: Convert to fraction form
    172,023.40/258,035.10 = 118,879.30/x
  3. Step 3: Cross multiply
    172,023.40x = 258,035.10 × 118,879.30
  4. Step 4: Simplify right side
    172,023.40x = 30,675,032,063.43
  5. Step 5: Solve for x
    x = 30,675,032,063.43/172,023.40
  6. Step 6: Final answer
    x = 178,318.95

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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.