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Finding the Fourth Proportional to 132,721, 183,154.98 and 73,105

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Solution

The fourth proportional to 132,721, 183,154.98 and 73,105 is: 100,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,721 : 183,154.98 = 73,105 : x
  2. Step 2: Convert to fraction form
    132,721/183,154.98 = 73,105/x
  3. Step 3: Cross multiply
    132,721x = 183,154.98 × 73,105
  4. Step 4: Simplify right side
    132,721x = 13,389,544,812.90
  5. Step 5: Solve for x
    x = 13,389,544,812.90/132,721
  6. Step 6: Final answer
    x = 100,884.90

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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.