Home / 65,145.60-89,942.40-40,003.20

Finding the Fourth Proportional to 65,145.60, 89,942.40 and 40,003.20

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Solution

The fourth proportional to 65,145.60, 89,942.40 and 40,003.20 is: 55,229.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,145.60 : 89,942.40 = 40,003.20 : x
  2. Step 2: Convert to fraction form
    65,145.60/89,942.40 = 40,003.20/x
  3. Step 3: Cross multiply
    65,145.60x = 89,942.40 × 40,003.20
  4. Step 4: Simplify right side
    65,145.60x = 3,597,983,815.68
  5. Step 5: Solve for x
    x = 3,597,983,815.68/65,145.60
  6. Step 6: Final answer
    x = 55,229.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.