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Finding the Fourth Proportional to 220,430.75, 330,739.72 and 120,474.14

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Solution

The fourth proportional to 220,430.75, 330,739.72 and 120,474.14 is: 180,762.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,430.75 : 330,739.72 = 120,474.14 : x
  2. Step 2: Convert to fraction form
    220,430.75/330,739.72 = 120,474.14/x
  3. Step 3: Cross multiply
    220,430.75x = 330,739.72 × 120,474.14
  4. Step 4: Simplify right side
    220,430.75x = 39,845,581,375.96
  5. Step 5: Solve for x
    x = 39,845,581,375.96/220,430.75
  6. Step 6: Final answer
    x = 180,762.36

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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.