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Finding the Fourth Proportional to 429,791.22, 644,534.28 and 126,100.62

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Solution

The fourth proportional to 429,791.22, 644,534.28 and 126,100.62 is: 189,106.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,791.22 : 644,534.28 = 126,100.62 : x
  2. Step 2: Convert to fraction form
    429,791.22/644,534.28 = 126,100.62/x
  3. Step 3: Cross multiply
    429,791.22x = 644,534.28 × 126,100.62
  4. Step 4: Simplify right side
    429,791.22x = 81,276,172,319.25
  5. Step 5: Solve for x
    x = 81,276,172,319.25/429,791.22
  6. Step 6: Final answer
    x = 189,106.17

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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.