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Finding the Fourth Proportional to 258,652.57, 387,995.25 and 81,166.58

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Solution

The fourth proportional to 258,652.57, 387,995.25 and 81,166.58 is: 121,755.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,652.57 : 387,995.25 = 81,166.58 : x
  2. Step 2: Convert to fraction form
    258,652.57/387,995.25 = 81,166.58/x
  3. Step 3: Cross multiply
    258,652.57x = 387,995.25 × 81,166.58
  4. Step 4: Simplify right side
    258,652.57x = 31,492,247,498.75
  5. Step 5: Solve for x
    x = 31,492,247,498.75/258,652.57
  6. Step 6: Final answer
    x = 121,755.02

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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.