Home / 74,086.20-111,129.30-72,790.20

Finding the Fourth Proportional to 74,086.20, 111,129.30 and 72,790.20

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Solution

The fourth proportional to 74,086.20, 111,129.30 and 72,790.20 is: 109,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,086.20 : 111,129.30 = 72,790.20 : x
  2. Step 2: Convert to fraction form
    74,086.20/111,129.30 = 72,790.20/x
  3. Step 3: Cross multiply
    74,086.20x = 111,129.30 × 72,790.20
  4. Step 4: Simplify right side
    74,086.20x = 8,089,123,972.86
  5. Step 5: Solve for x
    x = 8,089,123,972.86/74,086.20
  6. Step 6: Final answer
    x = 109,185.30

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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.