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Finding the Fourth Proportional to 258,641.88, 356,919.21 and 149,731.11

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Solution

The fourth proportional to 258,641.88, 356,919.21 and 149,731.11 is: 206,625.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,641.88 : 356,919.21 = 149,731.11 : x
  2. Step 2: Convert to fraction form
    258,641.88/356,919.21 = 149,731.11/x
  3. Step 3: Cross multiply
    258,641.88x = 356,919.21 × 149,731.11
  4. Step 4: Simplify right side
    258,641.88x = 53,441,909,493.62
  5. Step 5: Solve for x
    x = 53,441,909,493.62/258,641.88
  6. Step 6: Final answer
    x = 206,625.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.