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Finding the Fourth Proportional to 48,670.20, 72,964.80 and 20,611.80

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Solution

The fourth proportional to 48,670.20, 72,964.80 and 20,611.80 is: 30,900.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,670.20 : 72,964.80 = 20,611.80 : x
  2. Step 2: Convert to fraction form
    48,670.20/72,964.80 = 20,611.80/x
  3. Step 3: Cross multiply
    48,670.20x = 72,964.80 × 20,611.80
  4. Step 4: Simplify right side
    48,670.20x = 1,503,935,864.64
  5. Step 5: Solve for x
    x = 1,503,935,864.64/48,670.20
  6. Step 6: Final answer
    x = 30,900.55

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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.