Home / 87,139.44-120,245.40-49,417.20

Finding the Fourth Proportional to 87,139.44, 120,245.40 and 49,417.20

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Solution

The fourth proportional to 87,139.44, 120,245.40 and 49,417.20 is: 68,191.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,139.44 : 120,245.40 = 49,417.20 : x
  2. Step 2: Convert to fraction form
    87,139.44/120,245.40 = 49,417.20/x
  3. Step 3: Cross multiply
    87,139.44x = 120,245.40 × 49,417.20
  4. Step 4: Simplify right side
    87,139.44x = 5,942,190,980.88
  5. Step 5: Solve for x
    x = 5,942,190,980.88/87,139.44
  6. Step 6: Final answer
    x = 68,191.75

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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.