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Finding the Fourth Proportional to 105,423.20, 158,221.20 and 101,967.20

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Solution

The fourth proportional to 105,423.20, 158,221.20 and 101,967.20 is: 153,034.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,423.20 : 158,221.20 = 101,967.20 : x
  2. Step 2: Convert to fraction form
    105,423.20/158,221.20 = 101,967.20/x
  3. Step 3: Cross multiply
    105,423.20x = 158,221.20 × 101,967.20
  4. Step 4: Simplify right side
    105,423.20x = 16,133,372,744.64
  5. Step 5: Solve for x
    x = 16,133,372,744.64/105,423.20
  6. Step 6: Final answer
    x = 153,034.37

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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.