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Finding the Fourth Proportional to 137,234.80, 205,852.20 and 81,101.80

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Solution

The fourth proportional to 137,234.80, 205,852.20 and 81,101.80 is: 121,652.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,234.80 : 205,852.20 = 81,101.80 : x
  2. Step 2: Convert to fraction form
    137,234.80/205,852.20 = 81,101.80/x
  3. Step 3: Cross multiply
    137,234.80x = 205,852.20 × 81,101.80
  4. Step 4: Simplify right side
    137,234.80x = 16,694,983,953.96
  5. Step 5: Solve for x
    x = 16,694,983,953.96/137,234.80
  6. Step 6: Final answer
    x = 121,652.70

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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.