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Finding the Fourth Proportional to 69,419.89, 104,133.87 and 19,503.88

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Solution

The fourth proportional to 69,419.89, 104,133.87 and 19,503.88 is: 29,256.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,419.89 : 104,133.87 = 19,503.88 : x
  2. Step 2: Convert to fraction form
    69,419.89/104,133.87 = 19,503.88/x
  3. Step 3: Cross multiply
    69,419.89x = 104,133.87 × 19,503.88
  4. Step 4: Simplify right side
    69,419.89x = 2,031,013,983.75
  5. Step 5: Solve for x
    x = 2,031,013,983.75/69,419.89
  6. Step 6: Final answer
    x = 29,256.95

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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.