Home / 76,779.40-115,266.30-71,546.80

Finding the Fourth Proportional to 76,779.40, 115,266.30 and 71,546.80

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Solution

The fourth proportional to 76,779.40, 115,266.30 and 71,546.80 is: 107,410.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,779.40 : 115,266.30 = 71,546.80 : x
  2. Step 2: Convert to fraction form
    76,779.40/115,266.30 = 71,546.80/x
  3. Step 3: Cross multiply
    76,779.40x = 115,266.30 × 71,546.80
  4. Step 4: Simplify right side
    76,779.40x = 8,246,934,912.84
  5. Step 5: Solve for x
    x = 8,246,934,912.84/76,779.40
  6. Step 6: Final answer
    x = 107,410.78

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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.