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Finding the Fourth Proportional to 258,537.26, 387,806 and 81,058.10

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Solution

The fourth proportional to 258,537.26, 387,806 and 81,058.10 is: 121,587.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,537.26 : 387,806 = 81,058.10 : x
  2. Step 2: Convert to fraction form
    258,537.26/387,806 = 81,058.10/x
  3. Step 3: Cross multiply
    258,537.26x = 387,806 × 81,058.10
  4. Step 4: Simplify right side
    258,537.26x = 31,434,817,528.60
  5. Step 5: Solve for x
    x = 31,434,817,528.60/258,537.26
  6. Step 6: Final answer
    x = 121,587.18

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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.