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Finding the Fourth Proportional to 81,452.53, 122,140.46 and 31,555.99

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Solution

The fourth proportional to 81,452.53, 122,140.46 and 31,555.99 is: 47,319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,452.53 : 122,140.46 = 31,555.99 : x
  2. Step 2: Convert to fraction form
    81,452.53/122,140.46 = 31,555.99/x
  3. Step 3: Cross multiply
    81,452.53x = 122,140.46 × 31,555.99
  4. Step 4: Simplify right side
    81,452.53x = 3,854,262,976.58
  5. Step 5: Solve for x
    x = 3,854,262,976.58/81,452.53
  6. Step 6: Final answer
    x = 47,319.13

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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.