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Finding the Fourth Proportional to 139,744.20, 209,616.30 and 112,096.20

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Solution

The fourth proportional to 139,744.20, 209,616.30 and 112,096.20 is: 168,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,744.20 : 209,616.30 = 112,096.20 : x
  2. Step 2: Convert to fraction form
    139,744.20/209,616.30 = 112,096.20/x
  3. Step 3: Cross multiply
    139,744.20x = 209,616.30 × 112,096.20
  4. Step 4: Simplify right side
    139,744.20x = 23,497,190,688.06
  5. Step 5: Solve for x
    x = 23,497,190,688.06/139,744.20
  6. Step 6: Final answer
    x = 168,144.30

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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.