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Finding the Fourth Proportional to 228,979.31, 315,992.54 and 126,997.67

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Solution

The fourth proportional to 228,979.31, 315,992.54 and 126,997.67 is: 175,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,979.31 : 315,992.54 = 126,997.67 : x
  2. Step 2: Convert to fraction form
    228,979.31/315,992.54 = 126,997.67/x
  3. Step 3: Cross multiply
    228,979.31x = 315,992.54 × 126,997.67
  4. Step 4: Simplify right side
    228,979.31x = 40,130,317,424.86
  5. Step 5: Solve for x
    x = 40,130,317,424.86/228,979.31
  6. Step 6: Final answer
    x = 175,257.40

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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.