Home / 81,259.20-122,034.60-78,634.80

Finding the Fourth Proportional to 81,259.20, 122,034.60 and 78,634.80

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Solution

The fourth proportional to 81,259.20, 122,034.60 and 78,634.80 is: 118,093.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.20 : 122,034.60 = 78,634.80 : x
  2. Step 2: Convert to fraction form
    81,259.20/122,034.60 = 78,634.80/x
  3. Step 3: Cross multiply
    81,259.20x = 122,034.60 × 78,634.80
  4. Step 4: Simplify right side
    81,259.20x = 9,596,166,364.08
  5. Step 5: Solve for x
    x = 9,596,166,364.08/81,259.20
  6. Step 6: Final answer
    x = 118,093.29

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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.