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Finding the Fourth Proportional to 78,836.52, 118,191.99 and 45,518.79

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Solution

The fourth proportional to 78,836.52, 118,191.99 and 45,518.79 is: 68,241.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,836.52 : 118,191.99 = 45,518.79 : x
  2. Step 2: Convert to fraction form
    78,836.52/118,191.99 = 45,518.79/x
  3. Step 3: Cross multiply
    78,836.52x = 118,191.99 × 45,518.79
  4. Step 4: Simplify right side
    78,836.52x = 5,379,956,372.49
  5. Step 5: Solve for x
    x = 5,379,956,372.49/78,836.52
  6. Step 6: Final answer
    x = 68,241.93

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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.