Home / 84,682.31-126,986.55-28,507.34

Finding the Fourth Proportional to 84,682.31, 126,986.55 and 28,507.34

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Solution

The fourth proportional to 84,682.31, 126,986.55 and 28,507.34 is: 42,748.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,682.31 : 126,986.55 = 28,507.34 : x
  2. Step 2: Convert to fraction form
    84,682.31/126,986.55 = 28,507.34/x
  3. Step 3: Cross multiply
    84,682.31x = 126,986.55 × 28,507.34
  4. Step 4: Simplify right side
    84,682.31x = 3,620,048,121.34
  5. Step 5: Solve for x
    x = 3,620,048,121.34/84,682.31
  6. Step 6: Final answer
    x = 42,748.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.