Home / 81,507.57-122,237.66-31,576.55

Finding the Fourth Proportional to 81,507.57, 122,237.66 and 31,576.55

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Solution

The fourth proportional to 81,507.57, 122,237.66 and 31,576.55 is: 47,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,507.57 : 122,237.66 = 31,576.55 : x
  2. Step 2: Convert to fraction form
    81,507.57/122,237.66 = 31,576.55/x
  3. Step 3: Cross multiply
    81,507.57x = 122,237.66 × 31,576.55
  4. Step 4: Simplify right side
    81,507.57x = 3,859,842,813.80
  5. Step 5: Solve for x
    x = 3,859,842,813.80/81,507.57
  6. Step 6: Final answer
    x = 47,355.64

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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.