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Finding the Fourth Proportional to 118,115.73, 162,996.78 and 64,401.81

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Solution

The fourth proportional to 118,115.73, 162,996.78 and 64,401.81 is: 88,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,115.73 : 162,996.78 = 64,401.81 : x
  2. Step 2: Convert to fraction form
    118,115.73/162,996.78 = 64,401.81/x
  3. Step 3: Cross multiply
    118,115.73x = 162,996.78 × 64,401.81
  4. Step 4: Simplify right side
    118,115.73x = 10,497,287,656.17
  5. Step 5: Solve for x
    x = 10,497,287,656.17/118,115.73
  6. Step 6: Final answer
    x = 88,872.90

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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.