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Finding the Fourth Proportional to 258,362.57, 387,551.16 and 71,374.07

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Solution

The fourth proportional to 258,362.57, 387,551.16 and 71,374.07 is: 107,063.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,362.57 : 387,551.16 = 71,374.07 : x
  2. Step 2: Convert to fraction form
    258,362.57/387,551.16 = 71,374.07/x
  3. Step 3: Cross multiply
    258,362.57x = 387,551.16 × 71,374.07
  4. Step 4: Simplify right side
    258,362.57x = 27,661,104,591.30
  5. Step 5: Solve for x
    x = 27,661,104,591.30/258,362.57
  6. Step 6: Final answer
    x = 107,063.13

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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.