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Finding the Fourth Proportional to 78,986.80, 118,192.20 and 58,250.80

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Solution

The fourth proportional to 78,986.80, 118,192.20 and 58,250.80 is: 87,163.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,986.80 : 118,192.20 = 58,250.80 : x
  2. Step 2: Convert to fraction form
    78,986.80/118,192.20 = 58,250.80/x
  3. Step 3: Cross multiply
    78,986.80x = 118,192.20 × 58,250.80
  4. Step 4: Simplify right side
    78,986.80x = 6,884,790,203.76
  5. Step 5: Solve for x
    x = 6,884,790,203.76/78,986.80
  6. Step 6: Final answer
    x = 87,163.81

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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.