Home / 258,775.02-388,136.88-81,277.29

Finding the Fourth Proportional to 258,775.02, 388,136.88 and 81,277.29

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Solution

The fourth proportional to 258,775.02, 388,136.88 and 81,277.29 is: 121,907.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,775.02 : 388,136.88 = 81,277.29 : x
  2. Step 2: Convert to fraction form
    258,775.02/388,136.88 = 81,277.29/x
  3. Step 3: Cross multiply
    258,775.02x = 388,136.88 × 81,277.29
  4. Step 4: Simplify right side
    258,775.02x = 31,546,713,755.46
  5. Step 5: Solve for x
    x = 31,546,713,755.46/258,775.02
  6. Step 6: Final answer
    x = 121,907.88

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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.