Home / 57,145.52-78,856.44-31,991.60

Finding the Fourth Proportional to 57,145.52, 78,856.44 and 31,991.60

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Solution

The fourth proportional to 57,145.52, 78,856.44 and 31,991.60 is: 44,145.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,145.52 : 78,856.44 = 31,991.60 : x
  2. Step 2: Convert to fraction form
    57,145.52/78,856.44 = 31,991.60/x
  3. Step 3: Cross multiply
    57,145.52x = 78,856.44 × 31,991.60
  4. Step 4: Simplify right side
    57,145.52x = 2,522,743,685.90
  5. Step 5: Solve for x
    x = 2,522,743,685.90/57,145.52
  6. Step 6: Final answer
    x = 44,145.96

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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.