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Finding the Fourth Proportional to 228,631.79, 315,511.81 and 126,663.89

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Solution

The fourth proportional to 228,631.79, 315,511.81 and 126,663.89 is: 174,796.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,631.79 : 315,511.81 = 126,663.89 : x
  2. Step 2: Convert to fraction form
    228,631.79/315,511.81 = 126,663.89/x
  3. Step 3: Cross multiply
    228,631.79x = 315,511.81 × 126,663.89
  4. Step 4: Simplify right side
    228,631.79x = 39,963,951,301.32
  5. Step 5: Solve for x
    x = 39,963,951,301.32/228,631.79
  6. Step 6: Final answer
    x = 174,796.12

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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.