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Finding the Fourth Proportional to 259,059.12, 388,602.48 and 81,579.96

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Solution

The fourth proportional to 259,059.12, 388,602.48 and 81,579.96 is: 122,374.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,059.12 : 388,602.48 = 81,579.96 : x
  2. Step 2: Convert to fraction form
    259,059.12/388,602.48 = 81,579.96/x
  3. Step 3: Cross multiply
    259,059.12x = 388,602.48 × 81,579.96
  4. Step 4: Simplify right side
    259,059.12x = 31,702,174,774.30
  5. Step 5: Solve for x
    x = 31,702,174,774.30/259,059.12
  6. Step 6: Final answer
    x = 122,374.29

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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.