Home / 81,454.40-122,181.60-78,732.80

Finding the Fourth Proportional to 81,454.40, 122,181.60 and 78,732.80

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Solution

The fourth proportional to 81,454.40, 122,181.60 and 78,732.80 is: 118,099.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,454.40 : 122,181.60 = 78,732.80 : x
  2. Step 2: Convert to fraction form
    81,454.40/122,181.60 = 78,732.80/x
  3. Step 3: Cross multiply
    81,454.40x = 122,181.60 × 78,732.80
  4. Step 4: Simplify right side
    81,454.40x = 9,619,699,476.48
  5. Step 5: Solve for x
    x = 9,619,699,476.48/81,454.40
  6. Step 6: Final answer
    x = 118,099.20

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1.5x scale

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.