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Finding the Fourth Proportional to 137,226.80, 205,840.20 and 84,738.80

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Solution

The fourth proportional to 137,226.80, 205,840.20 and 84,738.80 is: 127,108.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,226.80 : 205,840.20 = 84,738.80 : x
  2. Step 2: Convert to fraction form
    137,226.80/205,840.20 = 84,738.80/x
  3. Step 3: Cross multiply
    137,226.80x = 205,840.20 × 84,738.80
  4. Step 4: Simplify right side
    137,226.80x = 17,442,651,539.76
  5. Step 5: Solve for x
    x = 17,442,651,539.76/137,226.80
  6. Step 6: Final answer
    x = 127,108.20

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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.