Home / 137,712.20-206,406.30-78,603.80

Finding the Fourth Proportional to 137,712.20, 206,406.30 and 78,603.80

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Solution

The fourth proportional to 137,712.20, 206,406.30 and 78,603.80 is: 117,813.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,712.20 : 206,406.30 = 78,603.80 : x
  2. Step 2: Convert to fraction form
    137,712.20/206,406.30 = 78,603.80/x
  3. Step 3: Cross multiply
    137,712.20x = 206,406.30 × 78,603.80
  4. Step 4: Simplify right side
    137,712.20x = 16,224,319,523.94
  5. Step 5: Solve for x
    x = 16,224,319,523.94/137,712.20
  6. Step 6: Final answer
    x = 117,813.23

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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.