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Finding the Fourth Proportional to 144,706.80, 199,684.44 and 81,030

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Solution

The fourth proportional to 144,706.80, 199,684.44 and 81,030 is: 111,815.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,706.80 : 199,684.44 = 81,030 : x
  2. Step 2: Convert to fraction form
    144,706.80/199,684.44 = 81,030/x
  3. Step 3: Cross multiply
    144,706.80x = 199,684.44 × 81,030
  4. Step 4: Simplify right side
    144,706.80x = 16,180,430,173.20
  5. Step 5: Solve for x
    x = 16,180,430,173.20/144,706.80
  6. Step 6: Final answer
    x = 111,815.27

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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.