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Finding the Fourth Proportional to 120,479.28, 166,265.70 and 72,723.30

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Solution

The fourth proportional to 120,479.28, 166,265.70 and 72,723.30 is: 100,360.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,479.28 : 166,265.70 = 72,723.30 : x
  2. Step 2: Convert to fraction form
    120,479.28/166,265.70 = 72,723.30/x
  3. Step 3: Cross multiply
    120,479.28x = 166,265.70 × 72,723.30
  4. Step 4: Simplify right side
    120,479.28x = 12,091,390,380.81
  5. Step 5: Solve for x
    x = 12,091,390,380.81/120,479.28
  6. Step 6: Final answer
    x = 100,360.75

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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.