Home / 84,501.45-126,751.83-21,321.72

Finding the Fourth Proportional to 84,501.45, 126,751.83 and 21,321.72

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Solution

The fourth proportional to 84,501.45, 126,751.83 and 21,321.72 is: 31,982.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,501.45 : 126,751.83 = 21,321.72 : x
  2. Step 2: Convert to fraction form
    84,501.45/126,751.83 = 21,321.72/x
  3. Step 3: Cross multiply
    84,501.45x = 126,751.83 × 21,321.72
  4. Step 4: Simplify right side
    84,501.45x = 2,702,567,028.75
  5. Step 5: Solve for x
    x = 2,702,567,028.75/84,501.45
  6. Step 6: Final answer
    x = 31,982.49

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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.