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Finding the Fourth Proportional to 79,172.68, 118,673.16 and 39,634.42

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Solution

The fourth proportional to 79,172.68, 118,673.16 and 39,634.42 is: 59,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172.68 : 118,673.16 = 39,634.42 : x
  2. Step 2: Convert to fraction form
    79,172.68/118,673.16 = 39,634.42/x
  3. Step 3: Cross multiply
    79,172.68x = 118,673.16 × 39,634.42
  4. Step 4: Simplify right side
    79,172.68x = 4,703,541,866.17
  5. Step 5: Solve for x
    x = 4,703,541,866.17/79,172.68
  6. Step 6: Final answer
    x = 59,408.65

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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.