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Finding the Fourth Proportional to 81,740.54, 122,544.64 and 25,551.72

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Solution

The fourth proportional to 81,740.54, 122,544.64 and 25,551.72 is: 38,306.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,740.54 : 122,544.64 = 25,551.72 : x
  2. Step 2: Convert to fraction form
    81,740.54/122,544.64 = 25,551.72/x
  3. Step 3: Cross multiply
    81,740.54x = 122,544.64 × 25,551.72
  4. Step 4: Simplify right side
    81,740.54x = 3,131,226,328.78
  5. Step 5: Solve for x
    x = 3,131,226,328.78/81,740.54
  6. Step 6: Final answer
    x = 38,306.90

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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.