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Finding the Fourth Proportional to 120,981.20, 181,471.80 and 36,741.20

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Solution

The fourth proportional to 120,981.20, 181,471.80 and 36,741.20 is: 55,111.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,981.20 : 181,471.80 = 36,741.20 : x
  2. Step 2: Convert to fraction form
    120,981.20/181,471.80 = 36,741.20/x
  3. Step 3: Cross multiply
    120,981.20x = 181,471.80 × 36,741.20
  4. Step 4: Simplify right side
    120,981.20x = 6,667,491,698.16
  5. Step 5: Solve for x
    x = 6,667,491,698.16/120,981.20
  6. Step 6: Final answer
    x = 55,111.80

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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.