Home / 259,340.04-389,010.06-81,971.61

Finding the Fourth Proportional to 259,340.04, 389,010.06 and 81,971.61

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Solution

The fourth proportional to 259,340.04, 389,010.06 and 81,971.61 is: 122,957.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,340.04 : 389,010.06 = 81,971.61 : x
  2. Step 2: Convert to fraction form
    259,340.04/389,010.06 = 81,971.61/x
  3. Step 3: Cross multiply
    259,340.04x = 389,010.06 × 81,971.61
  4. Step 4: Simplify right side
    259,340.04x = 31,887,780,924.40
  5. Step 5: Solve for x
    x = 31,887,780,924.40/259,340.04
  6. Step 6: Final answer
    x = 122,957.42

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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.