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Finding the Fourth Proportional to 258,622.56, 387,948.42 and 81,125.64

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Solution

The fourth proportional to 258,622.56, 387,948.42 and 81,125.64 is: 121,693.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,622.56 : 387,948.42 = 81,125.64 : x
  2. Step 2: Convert to fraction form
    258,622.56/387,948.42 = 81,125.64/x
  3. Step 3: Cross multiply
    258,622.56x = 387,948.42 × 81,125.64
  4. Step 4: Simplify right side
    258,622.56x = 31,472,563,859.49
  5. Step 5: Solve for x
    x = 31,472,563,859.49/258,622.56
  6. Step 6: Final answer
    x = 121,693.03

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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.