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Finding the Fourth Proportional to 73,170.40, 109,744.80 and 20,585.20

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Solution

The fourth proportional to 73,170.40, 109,744.80 and 20,585.20 is: 30,874.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,170.40 : 109,744.80 = 20,585.20 : x
  2. Step 2: Convert to fraction form
    73,170.40/109,744.80 = 20,585.20/x
  3. Step 3: Cross multiply
    73,170.40x = 109,744.80 × 20,585.20
  4. Step 4: Simplify right side
    73,170.40x = 2,259,118,656.96
  5. Step 5: Solve for x
    x = 2,259,118,656.96/73,170.40
  6. Step 6: Final answer
    x = 30,874.76

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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.