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Finding the Fourth Proportional to 258,640.08, 387,966.60 and 71,651.04

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Solution

The fourth proportional to 258,640.08, 387,966.60 and 71,651.04 is: 107,478.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,640.08 : 387,966.60 = 71,651.04 : x
  2. Step 2: Convert to fraction form
    258,640.08/387,966.60 = 71,651.04/x
  3. Step 3: Cross multiply
    258,640.08x = 387,966.60 × 71,651.04
  4. Step 4: Simplify right side
    258,640.08x = 27,798,210,375.26
  5. Step 5: Solve for x
    x = 27,798,210,375.26/258,640.08
  6. Step 6: Final answer
    x = 107,478.36

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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.