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Finding the Fourth Proportional to 81,391.48, 122,132.58 and 43,950.76

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Solution

The fourth proportional to 81,391.48, 122,132.58 and 43,950.76 is: 65,950.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.48 : 122,132.58 = 43,950.76 : x
  2. Step 2: Convert to fraction form
    81,391.48/122,132.58 = 43,950.76/x
  3. Step 3: Cross multiply
    81,391.48x = 122,132.58 × 43,950.76
  4. Step 4: Simplify right side
    81,391.48x = 5,367,819,711.76
  5. Step 5: Solve for x
    x = 5,367,819,711.76/81,391.48
  6. Step 6: Final answer
    x = 65,950.63

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1.5x scale

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.