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Finding the Fourth Proportional to 73,179, 100,988.10 and 39,645

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Solution

The fourth proportional to 73,179, 100,988.10 and 39,645 is: 54,710.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,179 : 100,988.10 = 39,645 : x
  2. Step 2: Convert to fraction form
    73,179/100,988.10 = 39,645/x
  3. Step 3: Cross multiply
    73,179x = 100,988.10 × 39,645
  4. Step 4: Simplify right side
    73,179x = 4,003,673,224.50
  5. Step 5: Solve for x
    x = 4,003,673,224.50/73,179
  6. Step 6: Final answer
    x = 54,710.69

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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.