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Finding the Fourth Proportional to 133,104.69, 183,662.79 and 78,649.28

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Solution

The fourth proportional to 133,104.69, 183,662.79 and 78,649.28 is: 108,523.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,104.69 : 183,662.79 = 78,649.28 : x
  2. Step 2: Convert to fraction form
    133,104.69/183,662.79 = 78,649.28/x
  3. Step 3: Cross multiply
    133,104.69x = 183,662.79 × 78,649.28
  4. Step 4: Simplify right side
    133,104.69x = 14,444,946,196.29
  5. Step 5: Solve for x
    x = 14,444,946,196.29/133,104.69
  6. Step 6: Final answer
    x = 108,523.19

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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.