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Finding the Fourth Proportional to 79,911.40, 119,940.72 and 40,496.08

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Solution

The fourth proportional to 79,911.40, 119,940.72 and 40,496.08 is: 60,781.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,911.40 : 119,940.72 = 40,496.08 : x
  2. Step 2: Convert to fraction form
    79,911.40/119,940.72 = 40,496.08/x
  3. Step 3: Cross multiply
    79,911.40x = 119,940.72 × 40,496.08
  4. Step 4: Simplify right side
    79,911.40x = 4,857,128,992.38
  5. Step 5: Solve for x
    x = 4,857,128,992.38/79,911.40
  6. Step 6: Final answer
    x = 60,781.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.