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Finding the Fourth Proportional to 45,396.80, 68,138.40 and 38,830.40

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Solution

The fourth proportional to 45,396.80, 68,138.40 and 38,830.40 is: 58,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,396.80 : 68,138.40 = 38,830.40 : x
  2. Step 2: Convert to fraction form
    45,396.80/68,138.40 = 38,830.40/x
  3. Step 3: Cross multiply
    45,396.80x = 68,138.40 × 38,830.40
  4. Step 4: Simplify right side
    45,396.80x = 2,645,841,327.36
  5. Step 5: Solve for x
    x = 2,645,841,327.36/45,396.80
  6. Step 6: Final answer
    x = 58,282.55

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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.