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Finding the Fourth Proportional to 118,672.78, 163,769.45 and 67,688.09

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Solution

The fourth proportional to 118,672.78, 163,769.45 and 67,688.09 is: 93,410.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,672.78 : 163,769.45 = 67,688.09 : x
  2. Step 2: Convert to fraction form
    118,672.78/163,769.45 = 67,688.09/x
  3. Step 3: Cross multiply
    118,672.78x = 163,769.45 × 67,688.09
  4. Step 4: Simplify right side
    118,672.78x = 11,085,241,270.85
  5. Step 5: Solve for x
    x = 11,085,241,270.85/118,672.78
  6. Step 6: Final answer
    x = 93,410.14

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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.