Home / 57,014.15-78,679.51-31,172.78

Finding the Fourth Proportional to 57,014.15, 78,679.51 and 31,172.78

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Solution

The fourth proportional to 57,014.15, 78,679.51 and 31,172.78 is: 43,018.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,014.15 : 78,679.51 = 31,172.78 : x
  2. Step 2: Convert to fraction form
    57,014.15/78,679.51 = 31,172.78/x
  3. Step 3: Cross multiply
    57,014.15x = 78,679.51 × 31,172.78
  4. Step 4: Simplify right side
    57,014.15x = 2,452,659,174.50
  5. Step 5: Solve for x
    x = 2,452,659,174.50/57,014.15
  6. Step 6: Final answer
    x = 43,018.43

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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.