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Finding the Fourth Proportional to 137,999.70, 206,999.55 and 120,503.70

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Solution

The fourth proportional to 137,999.70, 206,999.55 and 120,503.70 is: 180,755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,999.70 : 206,999.55 = 120,503.70 : x
  2. Step 2: Convert to fraction form
    137,999.70/206,999.55 = 120,503.70/x
  3. Step 3: Cross multiply
    137,999.70x = 206,999.55 × 120,503.70
  4. Step 4: Simplify right side
    137,999.70x = 24,944,211,673.34
  5. Step 5: Solve for x
    x = 24,944,211,673.34/137,999.70
  6. Step 6: Final answer
    x = 180,755.55

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1.5x scale

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.