Home / 57,138.05-78,889.48-35,636.20

Finding the Fourth Proportional to 57,138.05, 78,889.48 and 35,636.20

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Solution

The fourth proportional to 57,138.05, 78,889.48 and 35,636.20 is: 49,202.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,138.05 : 78,889.48 = 35,636.20 : x
  2. Step 2: Convert to fraction form
    57,138.05/78,889.48 = 35,636.20/x
  3. Step 3: Cross multiply
    57,138.05x = 78,889.48 × 35,636.20
  4. Step 4: Simplify right side
    57,138.05x = 2,811,321,000.86
  5. Step 5: Solve for x
    x = 2,811,321,000.86/57,138.05
  6. Step 6: Final answer
    x = 49,202.25

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1.5x scale

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.