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Finding the Fourth Proportional to 80,615.64, 120,923.30 and 21,451.32

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Solution

The fourth proportional to 80,615.64, 120,923.30 and 21,451.32 is: 32,176.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,615.64 : 120,923.30 = 21,451.32 : x
  2. Step 2: Convert to fraction form
    80,615.64/120,923.30 = 21,451.32/x
  3. Step 3: Cross multiply
    80,615.64x = 120,923.30 × 21,451.32
  4. Step 4: Simplify right side
    80,615.64x = 2,593,964,296.50
  5. Step 5: Solve for x
    x = 2,593,964,296.50/80,615.64
  6. Step 6: Final answer
    x = 32,176.94

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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.