Home / 51,780.24-71,427.60-31,078.44

Finding the Fourth Proportional to 51,780.24, 71,427.60 and 31,078.44

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Solution

The fourth proportional to 51,780.24, 71,427.60 and 31,078.44 is: 42,870.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,780.24 : 71,427.60 = 31,078.44 : x
  2. Step 2: Convert to fraction form
    51,780.24/71,427.60 = 31,078.44/x
  3. Step 3: Cross multiply
    51,780.24x = 71,427.60 × 31,078.44
  4. Step 4: Simplify right side
    51,780.24x = 2,219,858,380.94
  5. Step 5: Solve for x
    x = 2,219,858,380.94/51,780.24
  6. Step 6: Final answer
    x = 42,870.76

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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.