Home / 258,664.40-388,012.98-81,178.42

Finding the Fourth Proportional to 258,664.40, 388,012.98 and 81,178.42

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Solution

The fourth proportional to 258,664.40, 388,012.98 and 81,178.42 is: 121,772.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,664.40 : 388,012.98 = 81,178.42 : x
  2. Step 2: Convert to fraction form
    258,664.40/388,012.98 = 81,178.42/x
  3. Step 3: Cross multiply
    258,664.40x = 388,012.98 × 81,178.42
  4. Step 4: Simplify right side
    258,664.40x = 31,498,280,655.89
  5. Step 5: Solve for x
    x = 31,498,280,655.89/258,664.40
  6. Step 6: Final answer
    x = 121,772.77

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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.