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Finding the Fourth Proportional to 258,471.22, 387,707.08 and 80,992.08

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Solution

The fourth proportional to 258,471.22, 387,707.08 and 80,992.08 is: 121,488.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,471.22 : 387,707.08 = 80,992.08 : x
  2. Step 2: Convert to fraction form
    258,471.22/387,707.08 = 80,992.08/x
  3. Step 3: Cross multiply
    258,471.22x = 387,707.08 × 80,992.08
  4. Step 4: Simplify right side
    258,471.22x = 31,401,202,839.93
  5. Step 5: Solve for x
    x = 31,401,202,839.93/258,471.22
  6. Step 6: Final answer
    x = 121,488.20

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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.