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Finding the Fourth Proportional to 423,486.09, 635,176.89 and 123,963.48

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Solution

The fourth proportional to 423,486.09, 635,176.89 and 123,963.48 is: 185,929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,486.09 : 635,176.89 = 123,963.48 : x
  2. Step 2: Convert to fraction form
    423,486.09/635,176.89 = 123,963.48/x
  3. Step 3: Cross multiply
    423,486.09x = 635,176.89 × 123,963.48
  4. Step 4: Simplify right side
    423,486.09x = 78,738,737,699.98
  5. Step 5: Solve for x
    x = 78,738,737,699.98/423,486.09
  6. Step 6: Final answer
    x = 185,929.93

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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.