Home / 258,660,728.54-387,987,438.45-120,409,009.61

Finding the Fourth Proportional to 258,660,728.54, 387,987,438.45 and 120,409,009.61

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Solution

The fourth proportional to 258,660,728.54, 387,987,438.45 and 120,409,009.61 is: 180,611,813.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,660,728.54 : 387,987,438.45 = 120,409,009.61 : x
  2. Step 2: Convert to fraction form
    258,660,728.54/387,987,438.45 = 120,409,009.61/x
  3. Step 3: Cross multiply
    258,660,728.54x = 387,987,438.45 × 120,409,009.61
  4. Step 4: Simplify right side
    258,660,728.54x = 46,717,183,204,885,328
  5. Step 5: Solve for x
    x = 46,717,183,204,885,328/258,660,728.54
  6. Step 6: Final answer
    x = 180,611,813.28

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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.