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Finding the Fourth Proportional to 81,459.54, 122,203.71 and 28,899.54

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Solution

The fourth proportional to 81,459.54, 122,203.71 and 28,899.54 is: 43,354.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,459.54 : 122,203.71 = 28,899.54 : x
  2. Step 2: Convert to fraction form
    81,459.54/122,203.71 = 28,899.54/x
  3. Step 3: Cross multiply
    81,459.54x = 122,203.71 × 28,899.54
  4. Step 4: Simplify right side
    81,459.54x = 3,531,631,005.29
  5. Step 5: Solve for x
    x = 3,531,631,005.29/81,459.54
  6. Step 6: Final answer
    x = 43,354.42

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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.