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Finding the Fourth Proportional to 258,642.08, 387,969.60 and 71,653.04

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Solution

The fourth proportional to 258,642.08, 387,969.60 and 71,653.04 is: 107,481.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,642.08 : 387,969.60 = 71,653.04 : x
  2. Step 2: Convert to fraction form
    258,642.08/387,969.60 = 71,653.04/x
  3. Step 3: Cross multiply
    258,642.08x = 387,969.60 × 71,653.04
  4. Step 4: Simplify right side
    258,642.08x = 27,799,201,267.58
  5. Step 5: Solve for x
    x = 27,799,201,267.58/258,642.08
  6. Step 6: Final answer
    x = 107,481.36

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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.