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Finding the Fourth Proportional to 258,314.49, 387,488.16 and 68,771.79

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Solution

The fourth proportional to 258,314.49, 387,488.16 and 68,771.79 is: 103,162.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,314.49 : 387,488.16 = 68,771.79 : x
  2. Step 2: Convert to fraction form
    258,314.49/387,488.16 = 68,771.79/x
  3. Step 3: Cross multiply
    258,314.49x = 387,488.16 × 68,771.79
  4. Step 4: Simplify right side
    258,314.49x = 26,648,254,367.01
  5. Step 5: Solve for x
    x = 26,648,254,367.01/258,314.49
  6. Step 6: Final answer
    x = 103,162.06

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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.