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Finding the Fourth Proportional to 118,990.99, 164,195.40 and 71,243.11

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Solution

The fourth proportional to 118,990.99, 164,195.40 and 71,243.11 is: 98,308.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,990.99 : 164,195.40 = 71,243.11 : x
  2. Step 2: Convert to fraction form
    118,990.99/164,195.40 = 71,243.11/x
  3. Step 3: Cross multiply
    118,990.99x = 164,195.40 × 71,243.11
  4. Step 4: Simplify right side
    118,990.99x = 11,697,790,943.69
  5. Step 5: Solve for x
    x = 11,697,790,943.69/118,990.99
  6. Step 6: Final answer
    x = 98,308.21

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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.