Home / 258,609.18-387,920.25-71,622.30

Finding the Fourth Proportional to 258,609.18, 387,920.25 and 71,622.30

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Solution

The fourth proportional to 258,609.18, 387,920.25 and 71,622.30 is: 107,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,609.18 : 387,920.25 = 71,622.30 : x
  2. Step 2: Convert to fraction form
    258,609.18/387,920.25 = 71,622.30/x
  3. Step 3: Cross multiply
    258,609.18x = 387,920.25 × 71,622.30
  4. Step 4: Simplify right side
    258,609.18x = 27,783,740,521.58
  5. Step 5: Solve for x
    x = 27,783,740,521.58/258,609.18
  6. Step 6: Final answer
    x = 107,435.24

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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.