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Finding the Fourth Proportional to 423,663.99, 635,495.43 and 108,120.90

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Solution

The fourth proportional to 423,663.99, 635,495.43 and 108,120.90 is: 162,181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,663.99 : 635,495.43 = 108,120.90 : x
  2. Step 2: Convert to fraction form
    423,663.99/635,495.43 = 108,120.90/x
  3. Step 3: Cross multiply
    423,663.99x = 635,495.43 × 108,120.90
  4. Step 4: Simplify right side
    423,663.99x = 68,710,337,837.49
  5. Step 5: Solve for x
    x = 68,710,337,837.49/423,663.99
  6. Step 6: Final answer
    x = 162,181.21

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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.