Home / 258,829.77-388,283.82-81,320.07

Finding the Fourth Proportional to 258,829.77, 388,283.82 and 81,320.07

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Solution

The fourth proportional to 258,829.77, 388,283.82 and 81,320.07 is: 121,992.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,829.77 : 388,283.82 = 81,320.07 : x
  2. Step 2: Convert to fraction form
    258,829.77/388,283.82 = 81,320.07/x
  3. Step 3: Cross multiply
    258,829.77x = 388,283.82 × 81,320.07
  4. Step 4: Simplify right side
    258,829.77x = 31,575,267,422.27
  5. Step 5: Solve for x
    x = 31,575,267,422.27/258,829.77
  6. Step 6: Final answer
    x = 121,992.41

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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.