Home / 258,490.05-387,735.21-81,010.88

Finding the Fourth Proportional to 258,490.05, 387,735.21 and 81,010.88

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Solution

The fourth proportional to 258,490.05, 387,735.21 and 81,010.88 is: 121,516.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,490.05 : 387,735.21 = 81,010.88 : x
  2. Step 2: Convert to fraction form
    258,490.05/387,735.21 = 81,010.88/x
  3. Step 3: Cross multiply
    258,490.05x = 387,735.21 × 81,010.88
  4. Step 4: Simplify right side
    258,490.05x = 31,410,771,538.42
  5. Step 5: Solve for x
    x = 31,410,771,538.42/258,490.05
  6. Step 6: Final answer
    x = 121,516.37

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1.5x scale

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.