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Finding the Fourth Proportional to 66,204.70, 99,312.72 and 18,819.97

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Solution

The fourth proportional to 66,204.70, 99,312.72 and 18,819.97 is: 28,231.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,204.70 : 99,312.72 = 18,819.97 : x
  2. Step 2: Convert to fraction form
    66,204.70/99,312.72 = 18,819.97/x
  3. Step 3: Cross multiply
    66,204.70x = 99,312.72 × 18,819.97
  4. Step 4: Simplify right side
    66,204.70x = 1,869,062,411.02
  5. Step 5: Solve for x
    x = 1,869,062,411.02/66,204.70
  6. Step 6: Final answer
    x = 28,231.57

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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.