Home / 258,669.32-388,069.56-81,177.84

Finding the Fourth Proportional to 258,669.32, 388,069.56 and 81,177.84

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Solution

The fourth proportional to 258,669.32, 388,069.56 and 81,177.84 is: 121,787.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,669.32 : 388,069.56 = 81,177.84 : x
  2. Step 2: Convert to fraction form
    258,669.32/388,069.56 = 81,177.84/x
  3. Step 3: Cross multiply
    258,669.32x = 388,069.56 × 81,177.84
  4. Step 4: Simplify right side
    258,669.32x = 31,502,648,650.55
  5. Step 5: Solve for x
    x = 31,502,648,650.55/258,669.32
  6. Step 6: Final answer
    x = 121,787.34

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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.