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Finding the Fourth Proportional to 78,829.80, 118,244.70 and 43,400.40

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Solution

The fourth proportional to 78,829.80, 118,244.70 and 43,400.40 is: 65,100.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,829.80 : 118,244.70 = 43,400.40 : x
  2. Step 2: Convert to fraction form
    78,829.80/118,244.70 = 43,400.40/x
  3. Step 3: Cross multiply
    78,829.80x = 118,244.70 × 43,400.40
  4. Step 4: Simplify right side
    78,829.80x = 5,131,867,277.88
  5. Step 5: Solve for x
    x = 5,131,867,277.88/78,829.80
  6. Step 6: Final answer
    x = 65,100.60

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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.