Home / 81,750.72-122,672.68-31,824.36

Finding the Fourth Proportional to 81,750.72, 122,672.68 and 31,824.36

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Solution

The fourth proportional to 81,750.72, 122,672.68 and 31,824.36 is: 47,754.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,750.72 : 122,672.68 = 31,824.36 : x
  2. Step 2: Convert to fraction form
    81,750.72/122,672.68 = 31,824.36/x
  3. Step 3: Cross multiply
    81,750.72x = 122,672.68 × 31,824.36
  4. Step 4: Simplify right side
    81,750.72x = 3,903,979,530.48
  5. Step 5: Solve for x
    x = 3,903,979,530.48/81,750.72
  6. Step 6: Final answer
    x = 47,754.68

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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.