Home / 427,120.56-640,687.06-111,577.50

Finding the Fourth Proportional to 427,120.56, 640,687.06 and 111,577.50

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Solution

The fourth proportional to 427,120.56, 640,687.06 and 111,577.50 is: 167,367.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,120.56 : 640,687.06 = 111,577.50 : x
  2. Step 2: Convert to fraction form
    427,120.56/640,687.06 = 111,577.50/x
  3. Step 3: Cross multiply
    427,120.56x = 640,687.06 × 111,577.50
  4. Step 4: Simplify right side
    427,120.56x = 71,486,260,437.15
  5. Step 5: Solve for x
    x = 71,486,260,437.15/427,120.56
  6. Step 6: Final answer
    x = 167,367.87

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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.