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Finding the Fourth Proportional to 423,550.05, 635,403.03 and 139,256.65

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Solution

The fourth proportional to 423,550.05, 635,403.03 and 139,256.65 is: 208,910.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,550.05 : 635,403.03 = 139,256.65 : x
  2. Step 2: Convert to fraction form
    423,550.05/635,403.03 = 139,256.65/x
  3. Step 3: Cross multiply
    423,550.05x = 635,403.03 × 139,256.65
  4. Step 4: Simplify right side
    423,550.05x = 88,484,097,357.65
  5. Step 5: Solve for x
    x = 88,484,097,357.65/423,550.05
  6. Step 6: Final answer
    x = 208,910.61

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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.