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Finding the Fourth Proportional to 69,638.34, 104,461.95 and 19,722.39

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Solution

The fourth proportional to 69,638.34, 104,461.95 and 19,722.39 is: 29,584.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,638.34 : 104,461.95 = 19,722.39 : x
  2. Step 2: Convert to fraction form
    69,638.34/104,461.95 = 19,722.39/x
  3. Step 3: Cross multiply
    69,638.34x = 104,461.95 × 19,722.39
  4. Step 4: Simplify right side
    69,638.34x = 2,060,239,587.89
  5. Step 5: Solve for x
    x = 2,060,239,587.89/69,638.34
  6. Step 6: Final answer
    x = 29,584.85

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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.