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Finding the Fourth Proportional to 258,522.30, 387,819.90 and 81,010.80

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Solution

The fourth proportional to 258,522.30, 387,819.90 and 81,010.80 is: 121,527.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,522.30 : 387,819.90 = 81,010.80 : x
  2. Step 2: Convert to fraction form
    258,522.30/387,819.90 = 81,010.80/x
  3. Step 3: Cross multiply
    258,522.30x = 387,819.90 × 81,010.80
  4. Step 4: Simplify right side
    258,522.30x = 31,417,600,354.92
  5. Step 5: Solve for x
    x = 31,417,600,354.92/258,522.30
  6. Step 6: Final answer
    x = 121,527.62

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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.