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Finding the Fourth Proportional to 258,604.84, 387,934.28 and 71,616.36

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Solution

The fourth proportional to 258,604.84, 387,934.28 and 71,616.36 is: 107,432.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,604.84 : 387,934.28 = 71,616.36 : x
  2. Step 2: Convert to fraction form
    258,604.84/387,934.28 = 71,616.36/x
  3. Step 3: Cross multiply
    258,604.84x = 387,934.28 × 71,616.36
  4. Step 4: Simplify right side
    258,604.84x = 27,782,441,052.82
  5. Step 5: Solve for x
    x = 27,782,441,052.82/258,604.84
  6. Step 6: Final answer
    x = 107,432.02

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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.