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Finding the Fourth Proportional to 45,283.01, 67,902.66 and 18,980.69

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Solution

The fourth proportional to 45,283.01, 67,902.66 and 18,980.69 is: 28,461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,283.01 : 67,902.66 = 18,980.69 : x
  2. Step 2: Convert to fraction form
    45,283.01/67,902.66 = 18,980.69/x
  3. Step 3: Cross multiply
    45,283.01x = 67,902.66 × 18,980.69
  4. Step 4: Simplify right side
    45,283.01x = 1,288,839,000.12
  5. Step 5: Solve for x
    x = 1,288,839,000.12/45,283.01
  6. Step 6: Final answer
    x = 28,461.87

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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.