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Finding the Fourth Proportional to 67,277.40, 100,920.90 and 20,530.20

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Solution

The fourth proportional to 67,277.40, 100,920.90 and 20,530.20 is: 30,796.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,277.40 : 100,920.90 = 20,530.20 : x
  2. Step 2: Convert to fraction form
    67,277.40/100,920.90 = 20,530.20/x
  3. Step 3: Cross multiply
    67,277.40x = 100,920.90 × 20,530.20
  4. Step 4: Simplify right side
    67,277.40x = 2,071,926,261.18
  5. Step 5: Solve for x
    x = 2,071,926,261.18/67,277.40
  6. Step 6: Final answer
    x = 30,796.76

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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.