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Finding the Fourth Proportional to 68,980.34, 103,454.10 and 19,059.35

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Solution

The fourth proportional to 68,980.34, 103,454.10 and 19,059.35 is: 28,584.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,980.34 : 103,454.10 = 19,059.35 : x
  2. Step 2: Convert to fraction form
    68,980.34/103,454.10 = 19,059.35/x
  3. Step 3: Cross multiply
    68,980.34x = 103,454.10 × 19,059.35
  4. Step 4: Simplify right side
    68,980.34x = 1,971,767,383.56
  5. Step 5: Solve for x
    x = 1,971,767,383.56/68,980.34
  6. Step 6: Final answer
    x = 28,584.48

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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.