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Finding the Fourth Proportional to 258,613.75, 387,920.63 and 71,625.25

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Solution

The fourth proportional to 258,613.75, 387,920.63 and 71,625.25 is: 107,437.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,613.75 : 387,920.63 = 71,625.25 : x
  2. Step 2: Convert to fraction form
    258,613.75/387,920.63 = 71,625.25/x
  3. Step 3: Cross multiply
    258,613.75x = 387,920.63 × 71,625.25
  4. Step 4: Simplify right side
    258,613.75x = 27,784,912,103.91
  5. Step 5: Solve for x
    x = 27,784,912,103.91/258,613.75
  6. Step 6: Final answer
    x = 107,437.88

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1.5x scale

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.