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Finding the Fourth Proportional to 120,939.70, 181,409.55 and 36,699.70

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Solution

The fourth proportional to 120,939.70, 181,409.55 and 36,699.70 is: 55,049.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,939.70 : 181,409.55 = 36,699.70 : x
  2. Step 2: Convert to fraction form
    120,939.70/181,409.55 = 36,699.70/x
  3. Step 3: Cross multiply
    120,939.70x = 181,409.55 × 36,699.70
  4. Step 4: Simplify right side
    120,939.70x = 6,657,676,062.14
  5. Step 5: Solve for x
    x = 6,657,676,062.14/120,939.70
  6. Step 6: Final answer
    x = 55,049.55

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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.