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Finding the Fourth Proportional to 133,245.90, 183,881.61 and 79,520.49

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Solution

The fourth proportional to 133,245.90, 183,881.61 and 79,520.49 is: 109,739.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,245.90 : 183,881.61 = 79,520.49 : x
  2. Step 2: Convert to fraction form
    133,245.90/183,881.61 = 79,520.49/x
  3. Step 3: Cross multiply
    133,245.90x = 183,881.61 × 79,520.49
  4. Step 4: Simplify right side
    133,245.90x = 14,622,355,729.19
  5. Step 5: Solve for x
    x = 14,622,355,729.19/133,245.90
  6. Step 6: Final answer
    x = 109,739.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.