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Finding the Fourth Proportional to 81,630.45, 122,401.80 and 29,033.10

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Solution

The fourth proportional to 81,630.45, 122,401.80 and 29,033.10 is: 43,534.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,630.45 : 122,401.80 = 29,033.10 : x
  2. Step 2: Convert to fraction form
    81,630.45/122,401.80 = 29,033.10/x
  3. Step 3: Cross multiply
    81,630.45x = 122,401.80 × 29,033.10
  4. Step 4: Simplify right side
    81,630.45x = 3,553,703,699.58
  5. Step 5: Solve for x
    x = 3,553,703,699.58/81,630.45
  6. Step 6: Final answer
    x = 43,534.05

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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.