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Finding the Fourth Proportional to 120,991.53, 181,400.83 and 56,913.81

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Solution

The fourth proportional to 120,991.53, 181,400.83 and 56,913.81 is: 85,330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.53 : 181,400.83 = 56,913.81 : x
  2. Step 2: Convert to fraction form
    120,991.53/181,400.83 = 56,913.81/x
  3. Step 3: Cross multiply
    120,991.53x = 181,400.83 × 56,913.81
  4. Step 4: Simplify right side
    120,991.53x = 10,324,212,372.46
  5. Step 5: Solve for x
    x = 10,324,212,372.46/120,991.53
  6. Step 6: Final answer
    x = 85,330.04

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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.