Home / 124,787.20-187,180.80-78,131.20

Finding the Fourth Proportional to 124,787.20, 187,180.80 and 78,131.20

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Solution

The fourth proportional to 124,787.20, 187,180.80 and 78,131.20 is: 117,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,787.20 : 187,180.80 = 78,131.20 : x
  2. Step 2: Convert to fraction form
    124,787.20/187,180.80 = 78,131.20/x
  3. Step 3: Cross multiply
    124,787.20x = 187,180.80 × 78,131.20
  4. Step 4: Simplify right side
    124,787.20x = 14,624,660,520.96
  5. Step 5: Solve for x
    x = 14,624,660,520.96/124,787.20
  6. Step 6: Final answer
    x = 117,196.80

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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.