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Finding the Fourth Proportional to 54,235.76, 81,129 and 50,918

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Solution

The fourth proportional to 54,235.76, 81,129 and 50,918 is: 76,166.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,235.76 : 81,129 = 50,918 : x
  2. Step 2: Convert to fraction form
    54,235.76/81,129 = 50,918/x
  3. Step 3: Cross multiply
    54,235.76x = 81,129 × 50,918
  4. Step 4: Simplify right side
    54,235.76x = 4,130,926,422
  5. Step 5: Solve for x
    x = 4,130,926,422/54,235.76
  6. Step 6: Final answer
    x = 76,166.10

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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.