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Finding the Fourth Proportional to 45,108, 67,672.02 and 13,516.80

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Solution

The fourth proportional to 45,108, 67,672.02 and 13,516.80 is: 20,278.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,108 : 67,672.02 = 13,516.80 : x
  2. Step 2: Convert to fraction form
    45,108/67,672.02 = 13,516.80/x
  3. Step 3: Cross multiply
    45,108x = 67,672.02 × 13,516.80
  4. Step 4: Simplify right side
    45,108x = 914,709,159.94
  5. Step 5: Solve for x
    x = 914,709,159.94/45,108
  6. Step 6: Final answer
    x = 20,278.20

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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.