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Finding the Fourth Proportional to 258,655.01, 387,998.91 and 81,169.02

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Solution

The fourth proportional to 258,655.01, 387,998.91 and 81,169.02 is: 121,758.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,655.01 : 387,998.91 = 81,169.02 : x
  2. Step 2: Convert to fraction form
    258,655.01/387,998.91 = 81,169.02/x
  3. Step 3: Cross multiply
    258,655.01x = 387,998.91 × 81,169.02
  4. Step 4: Simplify right side
    258,655.01x = 31,493,491,285.77
  5. Step 5: Solve for x
    x = 31,493,491,285.77/258,655.01
  6. Step 6: Final answer
    x = 121,758.68

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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.