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Finding the Fourth Proportional to 258,412.86, 387,588.53 and 68,887.44

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Solution

The fourth proportional to 258,412.86, 387,588.53 and 68,887.44 is: 103,322.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,412.86 : 387,588.53 = 68,887.44 : x
  2. Step 2: Convert to fraction form
    258,412.86/387,588.53 = 68,887.44/x
  3. Step 3: Cross multiply
    258,412.86x = 387,588.53 × 68,887.44
  4. Step 4: Simplify right side
    258,412.86x = 26,699,981,260.63
  5. Step 5: Solve for x
    x = 26,699,981,260.63/258,412.86
  6. Step 6: Final answer
    x = 103,322.96

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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.