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Finding the Fourth Proportional to 78,958.90, 118,520.36 and 45,743.84

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Solution

The fourth proportional to 78,958.90, 118,520.36 and 45,743.84 is: 68,663.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.90 : 118,520.36 = 45,743.84 : x
  2. Step 2: Convert to fraction form
    78,958.90/118,520.36 = 45,743.84/x
  3. Step 3: Cross multiply
    78,958.90x = 118,520.36 × 45,743.84
  4. Step 4: Simplify right side
    78,958.90x = 5,421,576,436.56
  5. Step 5: Solve for x
    x = 5,421,576,436.56/78,958.90
  6. Step 6: Final answer
    x = 68,663.27

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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.