Home / 258,519.64-387,779.46-81,040.36

Finding the Fourth Proportional to 258,519.64, 387,779.46 and 81,040.36

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Solution

The fourth proportional to 258,519.64, 387,779.46 and 81,040.36 is: 121,560.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,519.64 : 387,779.46 = 81,040.36 : x
  2. Step 2: Convert to fraction form
    258,519.64/387,779.46 = 81,040.36/x
  3. Step 3: Cross multiply
    258,519.64x = 387,779.46 × 81,040.36
  4. Step 4: Simplify right side
    258,519.64x = 31,425,787,039.01
  5. Step 5: Solve for x
    x = 31,425,787,039.01/258,519.64
  6. Step 6: Final answer
    x = 121,560.54

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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.