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Finding the Fourth Proportional to 228,712.70, 315,623.67 and 125,346.44

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Solution

The fourth proportional to 228,712.70, 315,623.67 and 125,346.44 is: 172,978.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,712.70 : 315,623.67 = 125,346.44 : x
  2. Step 2: Convert to fraction form
    228,712.70/315,623.67 = 125,346.44/x
  3. Step 3: Cross multiply
    228,712.70x = 315,623.67 × 125,346.44
  4. Step 4: Simplify right side
    228,712.70x = 39,562,303,414.23
  5. Step 5: Solve for x
    x = 39,562,303,414.23/228,712.70
  6. Step 6: Final answer
    x = 172,978.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.