Home / 258,556.06-387,834.14-81,076.76

Finding the Fourth Proportional to 258,556.06, 387,834.14 and 81,076.76

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Solution

The fourth proportional to 258,556.06, 387,834.14 and 81,076.76 is: 121,615.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,556.06 : 387,834.14 = 81,076.76 : x
  2. Step 2: Convert to fraction form
    258,556.06/387,834.14 = 81,076.76/x
  3. Step 3: Cross multiply
    258,556.06x = 387,834.14 × 81,076.76
  4. Step 4: Simplify right side
    258,556.06x = 31,444,335,488.59
  5. Step 5: Solve for x
    x = 31,444,335,488.59/258,556.06
  6. Step 6: Final answer
    x = 121,615.16

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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.