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Finding the Fourth Proportional to 258,798.72, 388,198.08 and 71,810.28

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Solution

The fourth proportional to 258,798.72, 388,198.08 and 71,810.28 is: 107,715.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,798.72 : 388,198.08 = 71,810.28 : x
  2. Step 2: Convert to fraction form
    258,798.72/388,198.08 = 71,810.28/x
  3. Step 3: Cross multiply
    258,798.72x = 388,198.08 × 71,810.28
  4. Step 4: Simplify right side
    258,798.72x = 27,876,612,820.26
  5. Step 5: Solve for x
    x = 27,876,612,820.26/258,798.72
  6. Step 6: Final answer
    x = 107,715.42

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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.