Home / 258,631.56-387,961.92-81,134.64

Finding the Fourth Proportional to 258,631.56, 387,961.92 and 81,134.64

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Solution

The fourth proportional to 258,631.56, 387,961.92 and 81,134.64 is: 121,706.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,631.56 : 387,961.92 = 81,134.64 : x
  2. Step 2: Convert to fraction form
    258,631.56/387,961.92 = 81,134.64/x
  3. Step 3: Cross multiply
    258,631.56x = 387,961.92 × 81,134.64
  4. Step 4: Simplify right side
    258,631.56x = 31,477,150,712.91
  5. Step 5: Solve for x
    x = 31,477,150,712.91/258,631.56
  6. Step 6: Final answer
    x = 121,706.53

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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.